[Matplotlib-users] How do I unsubscribe?

2011-11-05 Thread Wayne Watson
Unsubscribe?

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[Matplotlib-users] Win7. Why Don't Matplotlib, ... Show up in Control Panel Add-Remove?

2010-08-08 Thread Wayne Watson
See Subject. I use matplotlib, scipy, numpy and possibly one other 
module. If I go to the control panel, I only see numpy listed. Why? I 
use a search and find only numpy and Python itself. How can matplotlib 
and scipy be uninstalled?

-- 
Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

  (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
   Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet

 An experiment is a question which science poses to
  Nature, and a measurement is the recording of
  Nature’s answer. -- Max Planck


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Re: [Matplotlib-users] Win7. Why Don't Matplotlib, ... Show up in Control Panel Add-Remove?

2010-08-08 Thread Wayne Watson
It and scipy work very well. I have 64-bit Win 7, HP Pavilon desktop. A 
re-examination shows the install files are all exe files, except I think 
for Python. I'm using 2.5 and need to stay there along with numpy 1.2.0. 
When you say uninstall, you must mean delete the file under C:\Python. 
Well, it's really not me that needs the help, it's my partner. He went 
off to 1.4, and it has caused trouble. Let's not go there. :-)

On 8/8/2010 4:33 PM, Stephen George wrote:
On 9/08/2010 9:19 AM, Wayne Watson wrote:

 See Subject. I use matplotlib, scipy, numpy and possibly one other
 module. If I go to the control panel, I only see numpy listed. Why? I
 use a search and find only numpy and Python itself. How can matplotlib
 and scipy be uninstalled?

  
 In my Win7 (64bit) I have 32 bit python 2.6 installed.

 matplotlib and numpy show under the add remove program functionality

 Python 2.6 matplotlib-0.99.3
 Python 2.6 numpy-1.4.1

 Along with heaps of other libraries I have installed

 Are you sure matplotlib is installed AND working?

 To remove I can only suggest you install again and then remove

 Steve

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-- 
Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

  (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
   Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet

 An experiment is a question which science poses to
  Nature, and a measurement is the recording of
  Nature’s answer. -- Max Planck


 Web Page:www.speckledwithstars.net/


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[Matplotlib-users] Max Size of an Attachment?

2010-03-01 Thread Wayne Watson
See Subject.  Is it 40K?

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Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

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Re: [Matplotlib-users] Max Size of an Attachment?

2010-03-01 Thread Wayne Watson
I use Tbird, and I think any jpg file I send is encoded in an acceptable 
format for e-mail delivery.  Aside from using attachments here, I 
recently noticed another Python list only allows 40K.

On 3/1/2010 7:58 AM, John Hunter wrote:
 On Mon, Mar 1, 2010 at 9:45 AM, Wayne Watson
 sierra_mtnv...@sbcglobal.net  wrote:

 See Subject.  Is it 40K?
  
 The max size of the message body is 200K.  If you are sending
 attachments, they will be mime encoded, so they encoding may be larger
 than the file size, and the limit applies to the encoded size.  I am
 the list moderator and will often approve messages over the limit if

* they are not too far over the limit

* they are topical and relevant

 I usually moderate the messages once a day.

 Many people use free drop services for larger attachments, eg http://drop.io

 JDH



-- 
Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

  (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
   Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet

Stop the illegal killing of dolphins and porpoises.
  http://www.takepart.com/thecove
   Wrest the control of the world's fisheries from Japan.

 Web Page:www.speckledwithstars.net/


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[Matplotlib-users] [OT] Bay Area PUG Meeting Speaker Thursday in Mountain View, CA?

2010-02-24 Thread Wayne Watson
Anyone here going to the meeting, see Subject? As far as I can tell, it 
meets from 7:30 to 9 pm. Their site shows no speaker yet, and there 
seems to be an informal group dinner at 6 pm at some place yet unknown. 
Are there other events and activities at the meeting? Pre-speaker 
events? Demonstrations?

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Re: [Matplotlib-users] py2exe message RuntimeError: Could not find the matplotlib data files?

2010-02-21 Thread Wayne Watson
Hmm. Actually I put it aside, thinking that it was correct. After 
spending quite a bit of time on it through queries to a few forums I 
was happy to find the rest of the story. This was not something I was 
desperate for, especially given the apparent complexity of it for 
matplotlib. The tutorial that got me started was pretty accurate for 
non-graphic programs, but suffered in one area of what I would call not 
emphasizing an important point. Once found all went fine.

I personally do not know the other five. I had brought this up on 
other forums, and it attracted several others. A few had no clue at 
all even though they offered solutions, but would seem to be content 
with the resolution.

So what do we have here? An incomplete and possibly wrong wiki? I find 
this a bit bizarre if several credible authors of Python point to py2exe 
as useful, but apparently do not tell the whole story.

So, yes, in light of this revelation, then I'm confused.

On 2/20/2010 10:43 PM, Christopher Barker wrote:

 Wayne Watson wrote:

 Thank you. That last link probably enlightened about six people.
  
 Are you one of those six? That page is unfortunate -- some folks don't
 quite get that a Wiki is supposed to be edited -- not just added to,
 like a forum. So that page could really use some clean up -- but if you
 read the whole page, you can see that it's gotten pretty easy.

 Are you still confused?

 -Chris


 On 2/19/2010 8:28 PM, Christoph Gohlke wrote:
  
 http://lmgtfy.com/?q=py2exe+matplotlib+data+filesl=1   leads me to
 http://www.py2exe.org/index.cgi/MatPlotLib.


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[Matplotlib-users] plot(x,y) Trouble?

2010-02-21 Thread Wayne Watson
I find this puzzling. It seems as though the x,y points in some fashion 
can vary.

plot(2.8,3.4) doesn't work in my program
plot([2.8],[3.4]) does work
plot((2.8,3.4)) apparently creates two points

Here's code where I have had to make x,y each a list. I've made comments 
about the behavior of x,y

 fig = figure()
 ax1 = fig.add_subplot(111)
 v = (0, 640, 0, 480)# min, max on x and y
 ax1.plot(xy[:,0], xy[:,1])   # draw all the lines
 title(afname)
 ylabel('vertical pixels')
 xlabel('horizontal pixels')
 # An attempt to draw an easy large circle. It worked, but zoom 
moves the circle. 320,235 not locked
 # If use (320,235), then get two circles.
 #ax1.plot([320],[235], marker='o', mfc='y', ms=400)   # 
draw large circle
 ax1.plot([xy[0,0]],[xy[0,1]],'gs')  # place marker at start.   
Had to list-ize array columns, but seems right
 ax1.plot([xy[npts-1,0]], [xy[npts-1,1]],'rs') # mark it is a 
last frame. More list-izing, but seems right
 ax1.plot([xy[k_max,0]], [xy[k_max,1]], marker='+', mec='g', 
ms=15) # mark maximum dist frame. Same listizing
 # Next is required for what I'm pretty sure are float64 numbers
 ax1.plot([amax_x], [amax_y], marker='o', mec='m',ms=5) # mark 
max amplitude.
 ax1.axis(v)
 show()

I think the zoom difficulty can be handled with patches. An area I have 
yet to probe.

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Re: [Matplotlib-users] py2exe message RuntimeError: Could not find the matplotlib data files?

2010-02-20 Thread Wayne Watson
Thank you. That last link probably enlightened about six people.

On 2/19/2010 8:28 PM, Christoph Gohlke wrote:
 http://lmgtfy.com/?q=py2exe+matplotlib+data+filesl=1  leads me to
 http://www.py2exe.org/index.cgi/MatPlotLib.

 - Christoph

 On 2/19/2010 7:11 PM, Wayne Watson wrote:

   OK, I'm on Win7.  From the py2exe tutorial,  I've found that  hello.exe
 works as expected by the tutorial. That file is in the dist folder.
 I've now tried this program, pylab_scatter.py:

  #!/usr/bin/env python
  from pylab import *

  N = 30
  x = 0.9*rand(N)
  y = 0.9*rand(N)
  area = pi*(10 * rand(N))**2 # 0 to 10 point radiuses
  scatter(x,y,s=area, marker='^', c='r')

  show()

 It runs properly in IDLE.
 ==
 It appears to compile properly. Now from the cmd prompt window:
 C:\Users\Wayne\Sandia_Meteors\Sentinel_Development\Learn_Python\Py2exe_Test\distpylab_scatter.exe
 Traceback (most recent call last):
File pylab_scatter.py, line 2, inmodule
File pylab.pyc, line 1, inmodule
File matplotlib\__init__.pyc, line 677, inmodule
File matplotlib\__init__.pyc, line 598, in rc_params
File matplotlib\__init__.pyc, line 552, in matplotlib_fname
File matplotlib\__init__.pyc, line 242, in wrapper
File matplotlib\__init__.pyc, line 482, in _get_data_path_cached
File matplotlib\__init__.pyc, line 478, in _get_data_path
 RuntimeError: Could not find the matplotlib data files
 ---What is this?

 C:\Users\Wayne\Sandia_Meteors\Sentinel_Development\Learn_Python\Py2exe_Test\dist
 ==
 I Googled this  py2exe message RuntimeError: Could not find the
 matplotlib data files. As of yet, it does not look like a solution ia
 available for matplotlib.

 -- 
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   talking when you're busy interrupting. -- Mark Twain



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Re: [Matplotlib-users] Looking for a Compiled Demo of MPL Graphics

2010-02-19 Thread Wayne Watson
Strange that there wouldn't be any such demos. ;-)  However, I'm now 
rolling my own.

On 2/15/2010 6:55 AM, Wayne Watson wrote:
 Does anyone know where I can find a compiled demo that uses MPL grphics?
 I'd like, if possible, a Win version whose size is less than 10M, so
 that I can send it via e-mail, if necessary. It should use plot, so that
 someone can manipulate the plot with the navigation controls. At this
 point, I have no idea if that method is the fundamental graph tool or
 not. I suspect it is.

 If a mailable demo isn't available, maybe there's a web site that one
 can download such examples from?


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[Matplotlib-users] py2exe message RuntimeError: Could not find the matplotlib data files?

2010-02-19 Thread Wayne Watson




OK, I'm on Win7. From the py2exe tutorial, I've found that hello.exe
works as expected by the
tutorial. That file is in the dist folder. 
I've now tried this program,
pylab_scatter.py:

#!/usr/bin/env python
from pylab import *
  
N = 30
x = 0.9*rand(N)
y = 0.9*rand(N)
area = pi*(10 * rand(N))**2 # 0 to 10 point radiuses
scatter(x,y,s=area, marker='^', c='r')
  
show()

It runs properly in IDLE.
==
It appears to compile properly. Now from the cmd prompt window:
C:\Users\Wayne\Sandia_Meteors\Sentinel_Development\Learn_Python\Py2exe_Test\distpylab_scatter.exe
Traceback (most recent call last):
 File "pylab_scatter.py", line 2, in module
 File "pylab.pyc", line 1, in module
 File "matplotlib\__init__.pyc", line 677, in module
 File "matplotlib\__init__.pyc", line 598, in rc_params
 File "matplotlib\__init__.pyc", line 552, in matplotlib_fname
 File "matplotlib\__init__.pyc", line 242, in wrapper
 File "matplotlib\__init__.pyc", line 482, in _get_data_path_cached
 File "matplotlib\__init__.pyc", line 478, in _get_data_path
RuntimeError: Could not find the matplotlib data files
---What is this?

C:\Users\Wayne\Sandia_Meteors\Sentinel_Development\Learn_Python\Py2exe_Test\dist
==
I Googled this py2exe message "RuntimeError: Could not find the
matplotlib data files". As of yet, it does not look like a solution ia
available for matplotlib. 
-- 
"There is nothing so annoying as to have two people 
 talking when you're busy interrupting." -- Mark Twain



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Re: [Matplotlib-users] Looking for a Compiled Demo of MPL Graphics

2010-02-19 Thread Wayne Watson
Thanks for the offer, but potentially I'm OK on py2exe.  I saw that, 
because I just ran into a snag in an unexpected way. I had tried two 
text output programs with success, then I tried one using pylab, and 
things went haywire. My problem is in route to this  mail list right 
now. An objection to matplotlib.

On 2/19/2010 8:46 AM, Christopher Barker wrote:
 Wayne Watson wrote:

 Strange that there wouldn't be any such demos. ;-)
  
 I've got a small prototype app that embeds MPL in wxPython, bundled up
 with py2exe (and py2app for the Mac). It's 11.7MB, if you want me to
 mail it to you.

 Bundled up python apps tend to be big, they have to include all of:

 -Your code (not usually very big)

 -Python itself (fairly big)

 -The gui toolkit (wxPython is very big)

 -Any other packages you are using.

 Bandwidth and disk space, and memory are cheaper than they used to be,
 so it's not that big a deal, really.


 However, I'm now  rolling my own.

 always a good lesson, anyway.

 -Chris




 On 2/15/2010 6:55 AM, Wayne Watson wrote:
  
 Does anyone know where I can find a compiled demo that uses MPL grphics?
 I'd like, if possible, a Win version whose size is less than 10M, so
 that I can send it via e-mail, if necessary. It should use plot, so that
 someone can manipulate the plot with the navigation controls. At this
 point, I have no idea if that method is the fundamental graph tool or
 not. I suspect it is.

 If a mailable demo isn't available, maybe there's a web site that one
 can download such examples from?


  



-- 
 There is nothing so annoying as to have two people
  talking when you're busy interrupting. -- Mark Twain


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Re: [Matplotlib-users] Where Do I Report MPL Guide Issues?

2010-02-16 Thread Wayne Watson
Good. Thanks. Did I do the right thing by posting here? Is it the case 
that all parts of the document are contributions?

On 2/15/2010 11:02 PM, Philipp Bender wrote:
 When I come back tonight I will try to fix the errors for you.

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[Matplotlib-users] Looking for a Compiled Demo of MPL Graphics

2010-02-15 Thread Wayne Watson
Does anyone know where I can find a compiled demo that uses MPL grphics? 
I'd like, if possible, a Win version whose size is less than 10M, so 
that I can send it via e-mail, if necessary. It should use plot, so that 
someone can manipulate the plot with the navigation controls. At this 
point, I have no idea if that method is the fundamental graph tool or 
not. I suspect it is.

If a mailable demo isn't available, maybe there's a web site that one 
can download such examples from?
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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Re: [Matplotlib-users] Placing a marker at specific places where lines join?

2010-02-15 Thread Wayne Watson
Hi, Phillip. don't know why the mail would be returned. The address I 
see above is correct. sierra_mtni...@sbcglobal.net. The only thing I can 
think of is that yahoo mail wanted you to allow you to ask for 
permission. Beats me.

Frankly, I've never really liked the reply format of mail lists. I use 
Thunderbird on Win. Sometimes I see messages in my inbox from someone 
and wonder are they trying for a private comm or just sending me a 
courtesy msg so that I should follow up on the list.  Then there's Reply 
vs Reply All, and some filter  problems. The latter can produce what I 
call the boomerang effect. Mail intended for me goes right into the list 
folder. There are goblins out there. :-)

To me all this can be solved by one word, Forum. Not a mail list. Aside 
from the possible cost (to the Python Org?), comm is much clearer on 
them.  Perhaps one disadvantage is that some people apparently have some 
bizarre form of e-mail that is not suitable for them.   Otherwise, I 
have no idea why they are not more often used.

html not allowed? The rules just vary too much to follow this. Same with 
bottom vs top posting in NGs. My view, and I'm not trying to be 
unfriendly here, is if one doesn't like what they see,  ignore it, and 
don't respond.

+NG. Expect the unexpected. The warriors and self appointed moderators 
hang out there. Some are just begging for a fight.
+e-mail. If you aren't communicating with your friends, misunderstanding 
often prevail.
+Forums: Almost bliss. I must belong to 30 of them.

I must say that I am really puzzled by your comments about a footnote. I 
really don't use them much. I've probably posted thousands of msgs to 
NGs, forums, mail lists and I've never heard word one about footnotes. I 
use them as I see fit, and that's not very often. In fact, I like your 
use of the footnote below.

I'm not even going to touch etiquette. I'd be really impressed if anyone 
follows them. I'll just say this. Internet communication by any of the 
methods above is sometimes just plain weird. It takes patience to use 
these methods. That includes personal e-mail. Someone should write a 
book about it. Preferably a shrink of psychologist. IMHO, the internet 
is generally meant for easy and informal communications, and not studied 
carefully written posts. That doesn't mean some care isn't needed. I see 
matters as a running dialogs. Both  parties need to ask questions about 
clarity. Too much is often assumed.Maybe I'll write about it. Let's not 
hold  our breaths.

Hey, no footnotes used above. VBG

Cheers.


On 2/14/2010 1:39 PM, Philipp Bender wrote:
 Hi Wayne,

 (I wanted to answer you directly but the mail came back, don't know why)
 I have several points that
 you really should work on if you expect anyone to answer to your mails in
 future. First, you should check the destination of your messages. I got at
 least three of your messages addressed only for me, you obviously wanted to
 send them to the list but they only reached me. So I didn't answer because the
 mailing list should be an open and searchable discussion platform and I didn't
 want to forward your message to the list or something like that. Please check
 that carefully in future.

 The next thing is that everyone must have the feeling that you completely
 ignore replies. This link here should have been an alert for you:

 http://www.freebsd.org/doc/en/articles/mailing-list-faq/etiquette.html

 This was posted as reply to one of your mails. One thing explained there is to
 not
 cite the original mail after the own reply, instead you should cite the
 original issue at the beginning or in parts directly before the parts of the
 answer. See below:


 How to do foo bar?

 Just like that.

 You see? The same thing about your footnotes*.

 Another thing is the HTML I received from your adress two times -- HTML has
 neither benefit nor a good reputation in mailing lists. I delete HTML mails
 without reading it in most cases.

 And, but that's maybe more a personal thing, I find it very unfriendly to ask
 in the subject and write in the body something like (see subject) -- we take
 the time to read your message, in respect to that you also should take the
 time to ask a complete question.

 Please don't misunderstand this message -- I don't want to blame you, I want
 to help you and make sure that you get answers to your questions in future.

 Regards,
 Philipp

 * like this one here. They don't help you, they don't explain anything, they
 don't help me reading the message, they have absolutely no benefit.

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Re: [Matplotlib-users] Placing a marker at specific places where lines join?

2010-02-14 Thread Wayne Watson
Did you see the figure I included to John? If not, let me put it simply. 
Suppose you have 50 straight sticks connected at their ends with some 
hook.  I want to color the hook holding stick 10 to 11, but color no 
other hook.  Not 99 hooks.

Yesterday, I tried  to do a simple plot of three points without markers. 
Worked fine. I then tried something like plot(1,2,bs).  I got an error 
. I tried variations on the plot with qualifiers. Zero. That seems like 
it should put the marker right at (1,2).

My immediate reaction to your example, is that it colors every hook. Am 
I missing something in your example?

On 2/14/2010 1:13 AM, Philipp Bender wrote:
 Why don't you just use the code provided here:

 http://matplotlib.sourceforge.net/examples/api/watermark_image.html

 The first thing to do when you want to plot something is maybe to look at the
 examples section, isn't it? It shows pretty good how to not only mark points,
 but also to mark points with semi-transparent circles.

 Please keep in mind: Plotting a set of lines and mark several points produces
 exactly the same image as plotting a set of lines and, above that, plot a set
 of circles. Maybe there are cleaner solutions, but to get an impression how
 to do things this might be enough.

 Cheers
 Philipp

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(see limbic, emotion, $$). -- WTW

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Re: [Matplotlib-users] Placing a marker at specific places where lines join?

2010-02-14 Thread Wayne Watson
Thank you for the code below. Yes, it actually does what I want it  to 
do. The difference in what I did similarly yesterday (see my response to 
Philipp moments ago) is the [ ], a list. All this  for one simple bit of 
list notation.

Somehow I'm not getting through to anyone what I have actually read. I 
do not plan to repeat it again here.  If I have some time in the near 
future, I will write a line by line criticism of the basic tutorial. OK, 
maybe the first page*. I already made some remarks about 5-6 days ago 
about that document. I think it was that one.  I'll submit it to one of 
the lists John provided on where I should send issues about the guide.

Now to put an end to the show() question. See my next post in a few 
minutes. Subject is down another pathway I think.

* Subject is FAQ Page Needs Some Work

On 2/14/2010 6:29 AM, Jae-Joon Lee wrote:
 On Sat, Feb 13, 2010 at 11:28 PM, Wayne Watson
 sierra_mtnv...@sbcglobal.net  wrote:

 Well, I'm not quite sure what to say to your claim. In certain instances I
 am trying to get through to someone here that something is missing for
 newbies. In one word, pedagogy (as perhaps in a text book, not a reference
 manual or dictionary). I'm trying to be positive about it, and not negative.
 Positive criticism I hope. I apologize if I offend you.
  
 The main matplotlib documentation has a section called user's guide
 (http://matplotlib.sourceforge.net/contents.html). And the third item
 in the user's guide is pyplot tutorial. So, I believe anyone who're
 willing to learn matplotlib, is willing to read through some sections
 of the user's guide and at least the tutorial. Is my standard too
 high?

 I'm not saying that the documentation is complete, and any suggestion
 (or even contribution) will be very appreciated. However, while you're
 saying that pedagogy is missing in our documentation, but it seems
 like that you  haven't even read the very basic tutorial (because, as
 John said, the answer to your original question is in that tutorial).
 And I doubt how this could be positive criticism (while I understand
 you want to be positive).

 Anyhow, for your original question, try

plot([0, 1, 2], [0, 1.5, 2], -)
plot([1], [1.5], go)

 -JJ



-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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[Matplotlib-users] Where Do I Report MPL Guide Issues?

2010-02-13 Thread Wayne Watson
In this case, it's spelling errors, mostly. axes for axis, etc.
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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[Matplotlib-users] Placing a marker at specific places where lines join?

2010-02-13 Thread Wayne Watson
Suppose I plot a line from (0,0) to (1,1.5) to (2,2). Now I want to mark 
(1,1.5) with a green circle. How is that done?
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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Re: [Matplotlib-users] How Does One Learn to Use MatPlotLib? (PUG)

2010-02-12 Thread Wayne Watson
I'm beginning to read aboutPython OOP, classes, inheritance and the 
like. It seems like an understanding of those concepts is key to 
understanding how the import needs are met.
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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[Matplotlib-users] My matplotlib To-Do List

2010-02-12 Thread Wayne Watson
I think I need a time out to consider my recent posts. This particular 
mod can wait while I get to other priority items into action again. So 
here's my list of thing to do when I come back to it.

Check out ipython more thoroughly.
Examine the backend concept
Read about the MPL interactive mode.
Look at the embedded app material in MPL.
Determine if a better interpreter tool than IDLE would satisfy the end 
users of the program I'm modifying. The hurdle is non-Python users who 
just fire up IDLE and execute the program via F5. That plus many are 
even reluctant to move from 2.4 to 2.5. New features could move that along.
Read the parts of the MPL Guide that I've culled out for my interests..
Attend a PUG meeting in the San Francisco Bay Area on the 25th.
Buy the (new) MPL book on Amazon if my local library can't get a loan of 
one of the two libraries in the US that has it.
Watch relevant videos from the 8th Annual Python in Science Conference

That should be enough, and should keep me busy when I expect to return 
to this in a few weeks. Thanks to the participants who responded to my 
posts.

-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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Re: [Matplotlib-users] My matplotlib To-Do List

2010-02-12 Thread Wayne Watson
Thanks. True enough. I've been exploring that  possibility, and it is 
probably the way to go.  When I get a little further down the line, I'll 
probably distribute it that  way.

On 2/12/2010 9:35 AM, Christopher Barker wrote:
 Wayne Watson wrote:

 So  here's my list of thing to do when I come back to it.
  
 good plan, one comment:


 Determine if a better interpreter tool than IDLE would satisfy the end
 users of the program I'm modifying. The hurdle is non-Python users who
 just fire up IDLE and execute the program via F5.
  
 This one is a no brainer -- IDLE is an Integrated Development
 Environment -- if you are not developing, you don't need it, t is NOT a
 tool to run simply run a python program. It's really not hard to run a
 python program.

 Note that py2exe and friends might be the best solution -- these are
 tools that build a self-contained executable from a python program, so
 you end up with something to double click on, just like any other program.

 I don't know about TkInter, but wxPython has an option where it will put
 up a message window to show the user standard output -- it sounds like
 you want the user to see messages, etc. Maybe TK has something similar.

 Good luck,

 -Chris






-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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[Matplotlib-users] Down Another Pathway with Plot-Show

2010-02-12 Thread Wayne Watson
Certainly in IDLE, when one hits a show() in a def, the program does not 
continue to the next statement. It goes somewhere else, because my 
program continues normally. Apparently, it goes back up the def calls to 
the main program, which is a loop that just reads the next file to 
perform more of what I expect.  If I know this to be true*, that allows 
a workaround with globals.

* There is another def that uses plot-show, and it continues without any 
notable difficulty. The show() is the last statement in the def. Of  
course, since show() is a  legitimate use, if one knows the end rule, 
this seems quite reasonable way to operate.
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

--
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Re: [Matplotlib-users] Finding the Supposed MPL show() bug.

2010-02-11 Thread Wayne Watson
A Ground Hog movie moment? Deja vu all over again (Quoting Yega Berra.).

I went right through John Hunter's comment of a day or two ago about the 
need to solve this with ipython. That has to be taken into 
consideration; otherwise, this is a no-go..

I suppose an interesting aside though on what I discovered through the 
debugger. When the program hit show(), it went back to the first line in 
the calling def instead of after where it was called. I suppose in some 
dim way one could use a global variable to detect that occurrence, and 
remedy matters. I'll defer to ipython.

On 2/10/2010 7:08 PM, Wayne Watson wrote:
 Foiled again. I clicked on the previous version, which has no MPL code
 in the same def.
 The show() is where things go wrong though. The question now is where
 did the program go after the show()? Maybe it's time to put the
 interactive debugger into play, which I've barely used. I have used others.

 On 2/10/2010 6:44 PM, Wayne Watson wrote:

 I chronicled some of my MPL problems here. It appeared that show()
 could be the problem. The problem is apparently the difference between
 running the program in IDLE and executing it from the folder (Maybe
 there's a name for that?). There are only about 8 lines of MPL code to
 the show() in a def. I inserted and moved a return down each line,
 executing the program afterwords. It behaved as expected, no plot.
 Once I removed the plot, I got the unexpected behavior. A video clip
 not played. So off to a direct py file execution. It worked fully.

 What this amounts to is that we need to find a better way for users to
 execute the program than through IDLE. Tomorrow  I'll pass this by the
 original developer.
  


-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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Re: [Matplotlib-users] Finding the Supposed MPL show() bug.

2010-02-11 Thread Wayne Watson




Definitely tkinter. I'll look at the link. Interestingly though, and I
think I mentioned this. There is another plot that's been working
fine. I seldom use it, but when I have, it seems to work. 

The developer stated this in a msg this morning.
Either
way should work. Double clicking the py file is probably more
convenient, but you can more easily see error messages if you open it
with IDLE

On 2/11/2010 7:38 AM, John Hunter wrote:

  On Thu, Feb 11, 2010 at 9:18 AM, Wayne Watson
sierra_mtnv...@sbcglobal.net wrote:
  
  
Yes, certainly,as you explained a few days ago, the present use is
incompatible with idle usage. Further, you mentioned the need for ipython
and the "backend" to make it work (in IDLE?). The way we are using problem
seems a bit ambiguous, so let me tell what I want the application to do.

  
  
From the screenshots, this appears to be a tk app that is being run
from idle.  If you are trying to integrate pyplot with this, it is a
mode of usage that is *explicitly not supported*.  Rather, you should
embed matplotlib in the app following the embedding_in_tk*.py examples
at

http://matplotlib.sourceforge.net/examples/user_interfaces/index.html

JDH

  


-- 
"Crime is way down. War is declining. And that's far from the good
news." -- Steven Pinker (and other sources)
Why is this true, but yet the media says otherwise? The media
knows very well how to manipulate us (see limbic, emotion, $$). -- WTW



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Re: [Matplotlib-users] Finding the Supposed MPL show() bug.

2010-02-11 Thread Wayne Watson




That link has no reference to tkinter. tk and tk2, plus a few others
with tk in their names, but nothing else.A search in the box produced
nothing.

On 2/11/2010 8:36 AM, Wayne Watson wrote:

  
Definitely tkinter. I'll look at the link. Interestingly though, and I
think I mentioned this. There is another plot that's been working
fine. I seldom use it, but when I have, it seems to work. 
  
The developer stated this in a msg this morning.
  Either
way should work. Double clicking the py file is probably more
convenient, but you can more easily see error messages if you open it
with IDLE
  
On 2/11/2010 7:38 AM, John Hunter wrote:
  
On Thu, Feb 11, 2010 at 9:18 AM, Wayne Watson
sierra_mtnv...@sbcglobal.net wrote:
  

  Yes, certainly,as you explained a few days ago, the present use is
incompatible with idle usage. Further, you mentioned the need for ipython
and the "backend" to make it work (in IDLE?). The way we are using problem
seems a bit ambiguous, so let me tell what I want the application to do.


From the screenshots, this appears to be a tk app that is being run
from idle.  If you are trying to integrate pyplot with this, it is a
mode of usage that is *explicitly not supported*.  Rather, you should
embed matplotlib in the app following the embedding_in_tk*.py examples
at

http://matplotlib.sourceforge.net/examples/user_interfaces/index.html

JDH

  
  
  
  -- 
"Crime is way down. War is declining. And that's far from the good
news." -- Steven Pinker (and other sources)
Why is this true, but yet the media says otherwise? The media
knows very well how to manipulate us (see limbic, emotion, $$). -- WTW
  

--
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-- 
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Why is this true, but yet the media says otherwise? The media
knows very well how to manipulate us (see limbic, emotion, $$). -- WTW



--
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Re: [Matplotlib-users] How Does One Learn to Use MatPlotLib?

2010-02-11 Thread Wayne Watson




Thanks for the info. I'm semi-resistant to ipython. I tried if for a
few hours, and it seemed a bit too much like linux. Years ago I used
linux a lot, and enjoyed it. I'll consider it. Windows is the game now.

Yes, actual use is good, but the needed imports seem a bit baffling.
scipy, pylab, matplotlib, ...? What components do  I only need for a
particular use?

The videos you mentioned could be helpful. 

I do not belong to any group, and my small town is a long way from any
educational resources.What I learn is from a few books, FAQs, and
recently the MPL Guide. Within a 50 mile radius, I know exactly one
other person who knows Python. He's a very bright high school student. 

On 2/9/2010 10:33 PM, Gökhan Sever wrote:

  
  On Tue, Feb 9, 2010 at 8:15 PM, Wayne Watson
  sierra_mtnv...@sbcglobal.net
wrote:
  Subject
is the question.

As I see it, it's useful to know MatLab. A simple query with matplotlib
tutorial shows a number of hits. The first, reference to v0.99.a
documentation barely qualifies. Examples galore and a pretty minimal
introduction. In the first 10 or so hits ther's a blog and mention of a
video. The blog may appeal to some, but it seems unelementary. The video
basically asks to sign in. Who knows where that goes? I've seen a few
videos for MPL, but they all look tied into $$.

I've made some reasonable progress on MPL, but am still far short of
being confident of using it.  Too much try this and see.

I know of exactly one book on MPL ( for scientists. sounds interesting).
It was published recently by a foreign author. It is not yet widely
distributed.

Your turn. Comments?
--
"Crime is way down. War is declining. And that's far from the good
news." -- Steven Pinker (and other sources) Why is this true, but yet
the media says otherwise? The media knows very well how to manipulate us
(see limbic, emotion, $$). -- WTW



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For me best way to learn is to use it actually :) Especially on
homework and projects. Mailing lists are also very helpful as you are
already doing. 
  
Try with ipython --pylab option. 
  
Also check SciPy09 (http://conference.scipy.org/SciPy2009/)
videos. There are one introductory and advanced tutorials that you can
see online (without registering) or downloading to your computer.
  
  
  
-- 
Gökhan


-- 
"Crime is way down. War is declining. And that's far from the good
news." -- Steven Pinker (and other sources)
Why is this true, but yet the media says otherwise? The media
knows very well how to manipulate us (see limbic, emotion, $$). -- WTW



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Re: [Matplotlib-users] Finding the Supposed MPL show() bug.

2010-02-11 Thread Wayne Watson
Thanks. Got detoured by not supported. I think I'll be  printing our 
your messages in the future. I just went back to one just now, and had 
forgotten about your mentio of pyLab, model.

On 2/11/2010 7:38 AM, John Hunter wrote:
 On Thu, Feb 11, 2010 at 9:18 AM, Wayne Watson
 sierra_mtnv...@sbcglobal.net  wrote:

 Yes, certainly,as  you explained a few days ago, the present use is
 incompatible with idle usage. Further, you mentioned the need for ipython
 and the backend to make it work (in IDLE?). The way we are using problem
 seems a bit ambiguous, so let me tell what I want the application to do.
  
  From the screenshots, this appears to be a tk app that is being run
 from idle.  If you are trying to integrate pyplot with this, it is a
 mode of usage that is *explicitly not supported*.  Rather, you should
 embed matplotlib in the app following the embedding_in_tk*.py examples
 at

 http://matplotlib.sourceforge.net/examples/user_interfaces/index.html

 JDH



-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

--
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[Matplotlib-users] A Menagerie of Imports

2010-02-11 Thread Wayne Watson
For newbies to MPL, needed imports seem a bit baffling. scipy, pylab, 
matplotlib, ...? What libs or lib components do  I only need for a 
particular use? Suppose I want to produce a scatter, contour, or 3d 
plot. What do I need minimally or more widely? I'm assuming that I don't 
want to use import matplotlib a lot, but something selectively like from 
matplotlib.image import AxesImage, or from matplotlib.plot import 
figure, show. What did I miss in my Python upbringing?
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

--
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Re: [Matplotlib-users] How Does One Learn to Use MatPlotLib? (PUG)

2010-02-11 Thread Wayne Watson
Well, here's an interesting twist on help, PUG, Python Users Groups. A 
world wide list is at http://wiki.python.org/moin/LocalUserGroups., 
The nearest one to me is near San Jose, CA about 180 miles from here, 
and meets the fourth Thursday of the month. Fortunately, I travel down 
there fairly often to visit friends and family. I think I'll mark my 
calendar.
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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[Matplotlib-users] Does Matplotlib have Image Processing?

2010-02-10 Thread Wayne Watson
See Subject. I see some fairly minimal IP in a image tutorial. I'm 
thinkig of things like a dark subtract.
-- 
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(see limbic, emotion, $$). -- WTW

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Re: [Matplotlib-users] Finding the Supposed MPL show() bug.

2010-02-10 Thread Wayne Watson
Foiled again. I clicked on the previous version, which has no MPL code 
in the same def.
The show() is where things go wrong though. The question now is where 
did the program go after the show()? Maybe it's time to put the 
interactive debugger into play, which I've barely used. I have used others.

On 2/10/2010 6:44 PM, Wayne Watson wrote:
 I chronicled some of my MPL problems here. It appeared that show() 
 could be the problem. The problem is apparently the difference between 
 running the program in IDLE and executing it from the folder (Maybe 
 there's a name for that?). There are only about 8 lines of MPL code to 
 the show() in a def. I inserted and moved a return down each line, 
 executing the program afterwords. It behaved as expected, no plot.  
 Once I removed the plot, I got the unexpected behavior. A video clip 
 not played. So off to a direct py file execution. It worked fully.

 What this amounts to is that we need to find a better way for users to 
 execute the program than through IDLE. Tomorrow  I'll pass this by the 
 original developer.

-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

--
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[Matplotlib-users] Finding the Supposed MPL show() bug.

2010-02-10 Thread Wayne Watson
I chronicled some of my MPL problems here. It appeared that show() could 
be the problem. The problem is apparently the difference between running 
the program in IDLE and executing it from the folder (Maybe there's a 
name for that?). There are only about 8 lines of MPL code to the show() 
in a def. I inserted and moved a return down each line, executing the 
program afterwords. It behaved as expected, no plot.  Once I removed the 
plot, I got the unexpected behavior. A video clip not played. So off to 
a direct py file execution. It worked fully.

What this amounts to is that we need to find a better way for users to 
execute the program than through IDLE. Tomorrow  I'll pass this by the 
original developer.
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

--
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[Matplotlib-users] Verifying the Use of show()? Win XP

2010-02-09 Thread Wayne Watson
I'm sure not making much progress on understanding show(). When used in 
XP in IDLE or by file execution (click on file name), it seems to tie up 
the executing program.  In IDLE, the shell window stops and one must 
exit the window.

I'd appreciate it if someone could take any examples from 
http://matplotlib.sourceforge.net/index.html and try to execute them 
as in the first paragraph to see if they terminate successfully.Let me 
know what OS used, hopefully XP, and if you used IDLE or file execution. 
I suspect you will find every example there ends with show(). Try 
putting a print statement after show() you've done it with the show() 
the last line.
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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Re: [Matplotlib-users] Verifying the Use of show()? Win XP

2010-02-09 Thread Wayne Watson
Version of Python would help too. I'm using 2.5.

On 2/9/2010 8:06 AM, Wayne Watson wrote:
 I'm sure not making much progress on understanding show(). When used in
 XP in IDLE or by file execution (click on file name), it seems to tie up
 the executing program.  In IDLE, the shell window stops and one must
 exit the window.

 I'd appreciate it if someone could take any examples from
 http://matplotlib.sourceforge.net/index.html  and try to execute them
 as in the first paragraph to see if they terminate successfully.Let me
 know what OS used, hopefully XP, and if you used IDLE or file execution.
 I suspect you will find every example there ends with show(). Try
 putting a print statement after show() you've done it with the show()
 the last line.


-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

--
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Re: [Matplotlib-users] Verifying the Use of show()? Win XP

2010-02-09 Thread Wayne Watson
Thanks for the clarification. I'm really new to this, and do not know of 
interactive mode. I presume there's a command to turn it off and on, and 
possibly an example on how to do it. Is this method of operation with 
show() mentioned anywhere?

The unfortunate present use of show() is that it ties up the shell 
script, where I happened to have written program output. It's handy to 
put it there, since it's meant to be interactive.  The user is keyboard 
arrowing through images, and statistical data is placed on the shell 
window. At the same time he sees a plot of data relevant to the image. 
He needs to close the plot window before going to the next image. I can 
probably figure out how to kill the plot window when he does that.

My problem with using ipython is that the program I'm modifying is used 
with IDLE, and people have gotten to use it that way. I had nothing to 
do with that method of op. I doubt any of the users would be agreeable 
to using ipython. None of them know Python. The next time the program is 
released, I may provide it in executable form.

I used matlab five years ago, for about two months. To see if it could 
help me understand MPL, I fired it up, and it's now working. Perhaps the 
interactive op is explained there. I take it there is no show() there?

Interesting mention of non-blocking. In the midst of this dilemma, I 
started getting socket errors. Using McAffe I found pythonw as blocked. 
Would that be in anyway associated with the use of show()?   I've since 
changed it to outbound blocking.

On 2/9/2010 8:18 AM, John Hunter wrote:
 On Tue, Feb 9, 2010 at 10:06 AM, Wayne Watson
 sierra_mtnv...@sbcglobal.net  wrote:

...
 the last line.

 show is meant to start the GUI mainloop, which is usually blocking,
 and raise all windows, so the behavior you are reporting is the
 intended behavior.  When working interactively, as in Idle, you
 shouldn't need to use show if you turn interactive mode on.

http://matplotlib.sourceforge.net/users/shell.html

 We recommend using ipython in pylab model when working interactively
 because it is designed to make the correct interactive settings and
 override show to be non-blocking.  You can obtain the right results
 in matplotlib using Idle if you are careful, but for just works out
 of the box ipython in pylab mode will be easier.

 JDH



-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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Re: [Matplotlib-users] Verifying the Use of show()? Win XP

2010-02-09 Thread Wayne Watson
Thanks. I'll consider it. See my post to John Hunter moments ago as to 
why I must use IDLE. Basically, the users are not at all familiar with 
Python, and historically the us has been that way for 3-4 years.

On 2/9/2010 8:20 AM, Ben Axelrod wrote:
 Maybe instead of plot.show() you should do something like:

 plot.draw()
 raw_input('Press ENTER to exit')

 Personally, I also use IDLE on Windows XP to edit my matplotlib files.  
 However, I never execute in IDLE.  I simply double click the file in windows 
 explorer.

 -Ben

 -Original Message-
 From: Wayne Watson [mailto:sierra_mtnv...@sbcglobal.net]
 Sent: Tuesday, February 09, 2010 11:07 AM
 To: matplotlib-users@lists.sourceforge.net
 Subject: [Matplotlib-users] Verifying the Use of show()? Win XP

 I'm sure not making much progress on understanding show(). When used in XP in 
 IDLE or by file execution (click on file name), it seems to tie up the 
 executing program.  In IDLE, the shell window stops and one must exit the 
 window.

 I'd appreciate it if someone could take any examples 
 fromhttp://matplotlib.sourceforge.net/index.html  and try to execute them 
 as in the first paragraph to see if they terminate successfully.Let me know 
 what OS used, hopefully XP, and if you used IDLE or file execution.
 I suspect you will find every example there ends with show(). Try putting a 
 print statement after show() you've done it with the show() the last line.
 --
 Crime is way down. War is declining. And that's far from the good news. -- 
 Steven Pinker (and other sources) Why is this true, but yet the media says 
 otherwise? The media knows very well how to manipulate us (see limbic, 
 emotion, $$). -- WTW

 --
 The Planet: dedicated and managed hosting, cloud storage, colocation Stay 
 online with enterprise data centers and the best network in the business 
 Choose flexible plans and management services without long-term contracts 
 Personal 24x7 support from experience hosting pros just a phone call away.
 http://p.sf.net/sfu/theplanet-com
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Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

--
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Re: [Matplotlib-users] Verifying the Use of show()? Win XP

2010-02-09 Thread Wayne Watson
Thanks. Completely missed it. (P.S. Reply All +corrected mail filter.)

On 2/9/2010 8:18 AM, John Hunter wrote:
 On Tue, Feb 9, 2010 at 10:06 AM, Wayne Watson
 sierra_mtnv...@sbcglobal.net  wrote:

 I'm sure not making much progress on understanding show(). When used in
 XP in IDLE or by file execution (click on file name), it seems to tie up
 the executing program.  In IDLE, the shell window stops and one must
  
...
http://matplotlib.sourceforge.net/users/shell.html

 We recommend using ipython in pylab model when working interactively
 because it is designed to make the correct interactive settings and
 override show to be non-blocking.  You can obtain the right results
 in matplotlib using Idle if you are careful, but for just works out
 of the box ipython in pylab mode will be easier.

 JDH



-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

--
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[Matplotlib-users] How Does One Learn to Use MatPlotLib?

2010-02-09 Thread Wayne Watson
Subject is the question.

As I see it, it's useful to know MatLab. A simple query with matplotlib 
tutorial shows a number of hits. The first, reference to v0.99.a 
documentation barely qualifies. Examples galore and a pretty minimal 
introduction. In the first 10 or so hits ther's a blog and mention of a 
video. The blog may appeal to some, but it seems unelementary. The video 
basically asks to sign in. Who knows where that goes? I've seen a few 
videos for MPL, but they all look tied into $$.

I've made some reasonable progress on MPL, but am still far short of 
being confident of using it.  Too much try this and see.

I know of exactly one book on MPL ( for scientists. sounds interesting). 
It was published recently by a foreign author. It is not yet widely 
distributed.

Your turn. Comments?
-- 
Crime is way down. War is declining. And that's far from the good 
news. -- Steven Pinker (and other sources) Why is this true, but yet 
the media says otherwise? The media knows very well how to manipulate us 
(see limbic, emotion, $$). -- WTW

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Re: [Matplotlib-users] Difference Between Scatter and Plot? (Zig-Zag)--Solution

2010-02-07 Thread Wayne Watson
(I see I forgot to post this solution to the list. I really have 
quickly developed a dislike for having to go to extra lengths to make 
sure this happens. Perhaps one of my difficulties is that some people 
respond directly to me, and my mail filter shuttles the message to my 
matplotlib folder instead of my inbox, so it looks like someone has sent 
their response to the list.)

Looking at your code suggests this is not what I want. The cumsum 
(summation) buffaloes me. I've just moved to Win7, and my PC is not yet 
ready for Python, so  I can't really grasp what you have.

 From what I've been able to determine from  a friend, who knows MatLab 
extremely well, this is not a difficult thing to  do in MatLab, and 
likely in MPL. The creation of the path across a canvas/figure is done 
with plot. It will draw the zig-zag starting with x0,y0. To show the 
path clearly there are several ways  to  proceed. I can color each point 
successively with R,G, and  B. The  first red point, maybe  with the 
help of an icon, says this is the start. Maybe a red circle. The next 
two points use a green and blue circle, probably of a  different size, 
or maybe a square. R,G,B is repeated along the path. Another choice is 
to define an arrow and orient it in the direction of the next segment. 
An appealing way to do all of this is to pause drawing the next segment. 
That way, the dynamics of the path are clearly seen.

On 2/5/2010 5:16 AM, Alan G Isaac wrote:
 On 2/5/2010 12:51 AM, Wayne Watson wrote:

   what I'm looking for is a way to draw a zig-zag path
   indicating a path taken by a particle

 Here is a 2d example:

 import numpy as np
 import matplotlib.pyplot as plt
 locs = np.random.random_sample((2,30))
 locs = np.random.random_sample((2,30)) - 0.5
 locs = np.cumsum(locs, axis=-1)
 x,y = locs
 plt.plot(x,y)

 hth,
 Alan Isaac


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Re: [Matplotlib-users] Uninstalling MatPlotLib (win7)? {Site-Packages?] -- Solved

2010-02-07 Thread Wayne Watson
As it turns out, this was easy to solve. What drove me to this point is 
that the distributor of the software I use mentioned that numpy had to 
be installed before MPL. I had only installed MPL when I ran into a 
program that failed. I thought it might be because I hadn't installed 
numpy first, in fac I had not at all installed it at that moment. Now I 
was faced with the question of backing out MPL. However, the MPL install 
had given several warnings about some file missing. This reinforced the 
idea order was needed.  As it turns out order doesn't matter here.  I 
installed numpy and all is working fine. I have no idea though when 
order does matter.

On 2/6/2010 4:39 AM, Christoph Gohlke wrote:
 Depending on the version and installer used, manually remove

 C:\Python25\Lib\site-packages\pylab.py
 C:\Python25\Lib\site-packages\matplotlib
 C:\Python25\Lib\site-packages\mpl_toolkits
 C:\Python25\Lib\site-packages\matplotlib*.egg-info
 C:\Python25\Removematplotlib.exe
 C:\Python25\matplotlib-wininst.log

 The packages dateutil and pytz are also installed along with matplotlib
 but might be used by other packages too.

 Christoph


 On 2/5/2010 12:11 PM, Wayne Watson wrote:

 I'm working in IDLE in Win7. It seems to me it gets stuck in
 site-packages under C:\Python25. Maybe this is as simple as deleting the
 entry?

 Well, yes there's a MPL folder under site-packages and an info MPL file
 of 540 bytes. There  are  also pylab.py, pyc,and py0 files under site.
 What to do next?

 On 2/5/2010 7:13 AM, Wayne Watson wrote:
  
 I should have installed  numpy first, and got some errors installing
 MPL. I don't see an uninstall in Control Panel Add/Rmv.


  
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Re: [Matplotlib-users] Difference Between Scatter and Plot? (Zig-Zag)--Solution

2010-02-07 Thread Wayne Watson
It's is  simple  as  pie. Put three points on a sheet of paper. Draw a 
line with an arrow on it from any point to another. Draw a line from the 
last point to the third the same way. The method I described will work 
fine. I can do this.  No need  for you to  attach  arrows  to what 
you've  done.  I think this is really wrapped up.

On 2/7/2010 9:54 AM, Alan G Isaac wrote:
 Wayne Watson wrote:

   The cumsum (summation) buffaloes me.
  
 That is just to create some artificial data,
 to illustrate.  If you have the coordinates
 in a 2 by N array named `locs`, just use the
 last 2 lines.  If you already have the
 coordinates separated into arrays x and y,
 just use the last line, i.e., plt.plot(x,y).
 Is that what you want?

 hth,
 Alan

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[Matplotlib-users] Using bounds on plot axises. Not clear how this works?

2010-02-07 Thread Wayne Watson
The segment below is supposed to plot two columns of (x,y) data and do 
it in an area 640x480. Apparently, I'm missing how to use v to get this 
done. It dies at col.axis(v) with list object has no attribute 'axis'. 
 From looking at some MPL examples, it's not clear to me how one uses 
axis here. I might have needed axes, but that doesn't work either.  
Comments?


...
 trk_stats = (amin, amax, mean, std, per_tile25, per_tile50, 
per_tile75)
 fig = figure()
 ax1 = fig.add_subplot(111)
 v = (0, 640, 0, 480)
 print shapes: , xy[:,0].shape, xy[:,1].shape
 col = ax1.plot(xy[:,0], xy[:,1])
 col.axis(v)
 show()
 print something for wtw plot
 print
 return trk_stats




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Re: [Matplotlib-users] How to close a plot?

2010-02-07 Thread Wayne Watson
Thanks. It seems most example of matplotlib end with show(). In fact, 
all may end that way, at least the short ones.

On 2/7/2010 1:50 PM, Jeff Whitaker wrote:
   I need to know how to close a figure/chart in matplot.


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Re: [Matplotlib-users] Using bounds on plot axises. Not clear how this works?

2010-02-07 Thread Wayne Watson
Yes, that did it. Thanks. Some of that code I copied from an example, 
the ax1 part. I guess it's related to subplot. The 1 on ax doesn't make 
much sense to me. Maybe there was an ax2 in the original, so there were 
two subplots. So it looks like to manipulate the subplot, one uses ax1 
with calls to color the end of lines, or changes the line to dashes?  
Maybe labels and titles?  Although that may be the way pyplot works.

On 2/7/2010 3:24 PM, Jae-Joon Lee wrote:
 try

 ax1.axis(v)

 -JJ


 On Sun, Feb 7, 2010 at 5:16 PM, Wayne Watson
 sierra_mtnv...@sbcglobal.net  wrote:

 The segment below is supposed to plot two columns of (x,y) data and do
 it in an area 640x480. Apparently, I'm missing how to use v to get this
 done. It dies at col.axis(v) with list object has no attribute 'axis'.
   From looking at some MPL examples, it's not clear to me how one uses
 axis here. I might have needed axes, but that doesn't work either.
 Comments?


 ...
  trk_stats = (amin, amax, mean, std, per_tile25, per_tile50,
 per_tile75)
  fig = figure()
  ax1 = fig.add_subplot(111)
  v = (0, 640, 0, 480)
  print shapes: , xy[:,0].shape, xy[:,1].shape
  col = ax1.plot(xy[:,0], xy[:,1])
  col.axis(v)
  show()
  print something for wtw plot
  print
  return trk_stats




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Re: [Matplotlib-users] How to close a plot?

2010-02-07 Thread Wayne Watson
Thanks. It seems most example of matplotlib end with show(). In fact, 
all may end that way, at least the short ones.

On 2/7/2010 1:50 PM, Jeff Whitaker wrote:
   I need to know how to close a figure/chart in matplolib.


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Re: [Matplotlib-users] How to close a plot?

2010-02-07 Thread Wayne Watson
Well, that didn't quite work.

I tried
...
fig=figure()
...
fig.close()
show()

and
show()
fig.close()

In the first case, I got the error msg:

On 2/7/2010 7:15 PM, Wayne Watson wrote: Figure has no attribute close
 Thanks. It seems most example of matplotlib end with show(). In fact,
 all may end that way, at least the short ones.

 On 2/7/2010 1:50 PM, Jeff Whitaker wrote:

   I need to know how to close a figure/chart in matplolib.

  


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Re: [Matplotlib-users] How to close a plot?

2010-02-07 Thread Wayne Watson
In the second case, after x, nothing really happened. The program 
resecuted the def it was in.

On 2/7/2010 7:19 PM, Wayne Watson wrote:
 Well, that didn't quite work.

 I tried
 ...
 fig=figure()
 ...
 fig.close()
 show()

 and
 show()
 fig.close()

 In the first case, I got the error msg:

 On 2/7/2010 7:15 PM, Wayne Watson wrote: Figure has no attribute close

 Thanks. It seems most example of matplotlib end with show(). In fact,
 all may end that way, at least the short ones.

 On 2/7/2010 1:50 PM, Jeff Whitaker wrote:

  
I need to know how to close a figure/chart in matplolib.

  



  


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[Matplotlib-users] MatPlotLib Usage FAQ Page Needs Some Work.

2010-02-06 Thread Wayne Watson




I can write some fairly decent Python code. In fact, I've recently
written 400-500 lines often using numpy. There are still a number of
concepts that are fuzzy. I have a modest familiarity of OOP from years
ago with C++, and a few things I've picked up from Python. Five years
ago, I was working with Matlab, but my knowledge has diminished. 

Nevertheless, I finally decided to graphics, MPL, to display what I'm
doing. I've had some modest success using very basic operations,
sometime guessing at usage along the way. I've looked through the
bewildering array of MPL, pylab, pyplot docs and examples. It's
slowly fitting together. I decided to give the following web page a
closer look to see what are the differences between the MPL players.
http://matplotlib.sourceforge.net/faq/usage_faq.html. I've
copied a few paragraphs at the start of the FAQ below.

I've studied it fairly carefully, and more or less comprehend it.
However, why does it need words like state-machine, convenience
functions, and object-oriented. I'm familiar with them all, but the
concepts really aren't presented clearly in relationship to the code
below. I'm not even sure if we are pro-pylab or pyplot as the
preferred-style. What part of some of the code is pyplot or otherwise?
Highlight it. Not everyone is clear on some of the assumed Python
concepts here.

It seems as though Python has a way of aligning itself with other
tools, For example, Matlab and Tk. Despite the apparent appeal of MPL
and Tkinter, seldom, maybe never, is anyone who is attracted to these
ideas really familiar with the tools on which they are based. (Perhaps
its the other way. Everyone knows them )Yet no explanation is
offered. What would that take, 3 pages each? 


Matplotlib, pylab, and pyplot: how are they related?
Matplotlib is the whole package; pylab is a module in matplotlib
that gets
installed alongside matplotlib;
and matplotlib.pyplot
is a
module in matplotlib.
Pyplot provides a Matlab-style state-machine interface to
the underlying object-oriented plotting library in matplotlib.
Pylab combines the pyplot functionality (for plotting) with the
numpy
functionality (for mathematics and for working with arrays)
in a single namespace, making that namespace
(or environment) even more Matlab-like. This is what you get if
you use the
ipython shell with the -pylab option, which imports
everything
from pylab and makes plotting fully interactive.

...

And using pyplot convenience functions, but object-orientation for
the rest:


import matplotlib.pyplot as plt
import numpy as np
x = np.arange(0, 10, 0.2)
y = np.sin(x)
fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(x, y)
plt.show()



So, why do all the extra typing required as one moves away from...
=



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[Matplotlib-users] Uninstalling MatPlotLib (win7)?

2010-02-05 Thread Wayne Watson
I should have installed  numpy first, and got some errors installing 
MPL. I don't see an uninstall in Control Panel Add/Rmv.
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Re: [Matplotlib-users] Uninstalling MatPlotLib (win7)? {Site-Packages?]

2010-02-05 Thread Wayne Watson
I'm working in IDLE in Win7. It seems to me it gets stuck in 
site-packages under C:\Python25. Maybe this is as simple as deleting the 
entry?

Well, yes there's a MPL folder under site-packages and an info MPL file 
of 540 bytes. There  are  also pylab.py, pyc,and py0 files under site. 
What to do next?

On 2/5/2010 7:13 AM, Wayne Watson wrote:
 I should have installed  numpy first, and got some errors installing
 MPL. I don't see an uninstall in Control Panel Add/Rmv.


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[Matplotlib-users] Difference Between Scatter and Plot?

2010-02-04 Thread Wayne Watson
Is there a difference between the two (Subject).  Perhaps plot connects 
lines in the order of x? However, scatter does not connect any points?
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Re: [Matplotlib-users] Difference Between Scatter and Plot? (Zig-Zag)

2010-02-04 Thread Wayne Watson
Simply explained what I'm looking for is a way to draw a zig-zag path 
indicating a path taken by a particle. Maybe this is best done with some 
tools outside of the normal plot capabilities?

On 2/4/2010 9:02 PM, Wayne Watson wrote:
 Is there a difference between the two (Subject).  Perhaps plot connects
 lines in the order of x? However, scatter does not connect any points?


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[Matplotlib-users] Connecting the Dots with Scatter Plot (Motion Jumps)

2010-02-03 Thread Wayne Watson
I have a bunch of (x,y) points that relate to an ordered path of a 
meteor; however, when plotted they may no become ordered. For example, 
(0,0), (2,2), (1,1), (3,4)  ... Point 2 jumps backwards. I'd like to 
connect the points with a line, or better, a line with an arrow 
indicating direction, so when someone looks at the plot, they can see 
how uneven the path is and any possible wild jumps in the direction. For 
example, (0,0), (0.5, 11), (1,1), (2,2) ... Can this be dome?
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[Matplotlib-users] How Exit Gracefully after a Show?

2010-02-03 Thread Wayne Watson
See Subject. I'm looking at an example whose last line is Show(). I see 
nothing on the graphic that will allow me to exit. If I select the x in 
the upper right, it dies badly.
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Re: [Matplotlib-users] Printing Graphs and Image Processing Operations

2010-01-19 Thread Wayne Watson
Thanks. I'll keep this in mind when I get to the point when I'm ready to 
consider it as part of a program I'm writing. Someone in Image-SIG sent 
me a module he wrote that might be helpful too.

Michael Droettboom wrote:
 Wayne Watson wrote:
 I've used MPL a bit, and am wondering if there's a facility for 
 sending graphic images to a printer, or putting them in some format 
 like png?   I don't necessarily want the graphics to appear in a 
 window, but would like to print them directly once they are ready. 
 Can one put in a page feed, so that images don't all fall on the same 
 page or cut across pages?
   
 You can use one of the non-GUI backends to generate plots in a number 
 of formats, including PNG, PDF, PS and SVG.  See this:

 http://matplotlib.sourceforge.net/faq/installing_faq.html#backends

 The PDF backend is the only one I'm aware of that supports multiple 
 pages.  This is the docstring for PdfPages:

A multi-page PDF file.

Use like this::

# Initialize:
pp = PdfPages('foo.pdf')

# As many times as you like, create a figure fig, then either:
fig.savefig(pp, format='pdf') # note the format argument!
# or:
pp.savefig(fig)

# Once you are done, remember to close the object:
pp.close()

(In reality PdfPages is a thin wrapper around PdfFile, in order to
avoid confusion when using savefig and forgetting the format
argument.)

 Is there any image processing operation available to do simple 
 operations like dark subtract or stack different images on one other 
 to produce composites of several images?  Maybe Python has such a 
 facility that's already available as a library?

   
 Matplotlib doesn't have a very strong set of these things built-in 
 (though some things are possible with the image support in the image 
 module).  You can also get an rgb buffer of the figure (when using the 
 Agg backend), eg. (where 'fig' is the figure object):

   fig.canvas.get_renderer().tostring_rgb()

 This is a string of 24-bit rgb triples, which can be converted to the 
 Numpy array for arithmetical processing, or converted to a Python 
 Imaging Library Image object.

 Mike


-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

   I was thinking about how people seem to read the Bible
a whole lot more as they get older; then it dawned on 
me . . they're cramming for their final exam.
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[Matplotlib-users] Printing Graphs and Image Processing Operations

2010-01-15 Thread Wayne Watson
I've used MPL a bit, and am wondering if there's a facility for sending 
graphic images to a printer, or putting them in some format like png?   
I don't necessarily want the graphics to appear in a window, but would 
like to print them directly once they are ready. Can one put in a page 
feed, so that images don't all fall on the same page or cut across pages?

Is there any image processing operation available to do simple 
operations like dark subtract or stack different images on one other to 
produce composites of several images?  Maybe Python has such a facility 
that's already available as a library?

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

   I was thinking about how people seem to read the Bible
a whole lot more as they get older; then it dawned on 
me . . they're cramming for their final exam.
-- George Carlin
 
Web Page: www.speckledwithstars.net/


--
Throughout its 18-year history, RSA Conference consistently attracts the
world's best and brightest in the field, creating opportunities for Conference
attendees to learn about information security's most important issues through
interactions with peers, luminaries and emerging and established companies.
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Re: [Matplotlib-users] I Need a Couple of Tips for Windows to Get Started on IPython

2009-12-07 Thread Wayne Watson
Good. Thanks. Interesting that ls and pwd are used for Win, but that's 
fine. How do I copy parts of the window?  All I can do at the moment is 
sweep out a rectangular area with the mouse. It looks like I 
underestimated the need for  automagic.

David Arnold wrote:
 Depends on whether automagic is enabled or not. If automagic is OFF, 
 you  need to enter the %, as in %cd. If automagic is ON (the default), 
 then you don't need to enter the %, as in cd.

 automagic can be toggled on and off as follows:

 In [8]: automagic

 Automagic is OFF, % prefix IS needed for magic functions.

 In [9]: %automagic

 Automagic is ON, % prefix NOT needed for magic functions.

 On my mac, I can change to my home directory as follows:

 In [10]: cd
 /Users/darnold

 I can list the files in this directory with:

 In [11]: ls
 Desktop/Movies/context/
 Documents/Music/java.log.344
 Downloads/NetBeansProjects/java.log.415
 Dropbox/Pictures/luatex-cache/
 Library/Public/matlab_crash_dump.344
 LizThesis/Sites/matlab_crash_dump.415

 I can cd into my Sites folder with:

 In [12]: cd Sites
 /Users/darnold/Sites

 I can get the current directory with:

 In [13]: pwd
 Out[13]: '/Users/darnold/Sites'

 I can move up a directory level with:

 In [14]: cd ..
 /Users/darnold


 Hope this helps.

 D.


 On Dec 6, 2009, at 3:01 PM, Wayne Watson wrote:

 I've seen the tutorial, but need something more. How do I know what
 folder I'm in? How do I move from where I am to, for example,
 C:\abc\def? So far I've tried various combinations like this:

 cd ..
 cd C:\
 pwd (yes, I know it's not windows)

 I tried %cd .., and that may have moved me but I seem to get back to the
 same place.

 I seem to be in  C:\Documents and Settings\administrator. If I doa %cp
 ..\\ it looks like I get to C:\, but follwing that with pwd gets me back
 to where I started--C:\Documents and Settings\administrator.

 If I want to execute a program with %run, I need to be where abc.py is
 or, perhaps say something like %run C:\myPyPrograms\abc.py.
 Dir doesn't work and I haven't been able to even see what's in the 
 folder.


 -- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet

 ... humans'innate skills with numbers isn't much
  better than that of rats and dolphins.
   -- Stanislas Dehaene, neurosurgeon

Web Page: www.speckledwithstars.net/


 --
  

 Join us December 9, 2009 for the Red Hat Virtual Experience,
 a free event focused on virtualization and cloud computing.
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-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

 ... humans'innate skills with numbers isn't much
  better than that of rats and dolphins. 
   -- Stanislas Dehaene, neurosurgeon 
 
Web Page: www.speckledwithstars.net/


--
Join us December 9, 2009 for the Red Hat Virtual Experience,
a free event focused on virtualization and cloud computing. 
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[Matplotlib-users] Replying with Thunderbird. Reply All doesn't cut it all the time.

2009-12-07 Thread Wayne Watson
I see a variance with replying to a post on this list and other Python 
lists. It appears to be a difference between the way people post. If I 
see From: a...@xyz.net and To: matplotlib-users@lists.sourceforge.net, 
then Reply All gets both. If I see, From: joe...@xyz.net and To: my 
e-mail address (or any personal e-address), then Reply All only goes to 
the From e-address, which means I have to fill in the e-address for this 
mail list. Apparently, some people from outside using a mail program 
like Thunderbird. How do I get two for price of one, so to speak?

Comments?

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

 ... humans'innate skills with numbers isn't much
  better than that of rats and dolphins. 
   -- Stanislas Dehaene, neurosurgeon 
 
Web Page: www.speckledwithstars.net/


--
Join us December 9, 2009 for the Red Hat Virtual Experience,
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Re: [Matplotlib-users] I Need a Couple of Tips for Windows to Get Started on IPython

2009-12-07 Thread Wayne Watson
Well, that's interesting, but how did you copy and paste?
Quick Python offers this, but no explanation how to copy and paste.
The %hist command can show you all previous input, without line numbers 
if desired (option -n) so you can directly copy and paste code either 
back in IPython or in a text editor. You can also save all your history 
by turning on logging via %logstart; these logs can later be either 
reloaded as IPython sessions or used as code for your programs.
Aside from that, here's an example of what I'd like to copy. If it 
doesn't make it through, it's just a screen capture of part of the 
window's contents show the result of ls, cd, etc.

Image above this.
Over and out ...

David Arnold wrote:
 In [13]: history
 1 : #?edit
 2 : hist
 3 : a=12
 4 : b=3
 5 : c=4
 6 : f=a*b+c
 7 : hist
 8 : _ip.magic(magic )
 9 : _ip.magic(automagic )
 10: _ip.magic(automagic )
 11: his 1-4
 12: hist(1-4)
 13: _ip.magic(history )

 In [14]: edit 3-6



 On Dec 7, 2009, at 8:41 AM, Wayne Watson wrote:

 Good. Thanks. Interesting that ls and pwd are used for Win, but 
 that's fine. How do I copy parts of the window?  All I can do at the 
 moment is sweep out a rectangular area with the mouse. It looks like 
 I underestimated the need for  automagic.

 David Arnold wrote:
 Depends on whether automagic is enabled or not. If automagic is 
 OFF, you  need to enter the %, as in %cd. If automagic is ON (the 
 default), then you don't need to enter the %, as in cd.

 automagic can be toggled on and off as follows:

 In [8]: automagic

 Automagic is OFF, % prefix IS needed for magic functions.

 In [9]: %automagic

 Automagic is ON, % prefix NOT needed for magic functions.

 On my mac, I can change to my home directory as follows:

 In [10]: cd
 /Users/darnold

 I can list the files in this directory with:

 In [11]: ls
 Desktop/Movies/context/
 Documents/Music/java.log.344
 Downloads/NetBeansProjects/java.log.415
 Dropbox/Pictures/luatex-cache/
 Library/Public/matlab_crash_dump.344
 LizThesis/Sites/matlab_crash_dump.415

 I can cd into my Sites folder with:

 In [12]: cd Sites
 /Users/darnold/Sites

 I can get the current directory with:

 In [13]: pwd
 Out[13]: '/Users/darnold/Sites'

 I can move up a directory level with:

 In [14]: cd ..
 /Users/darnold


 Hope this helps.

 D.


 On Dec 6, 2009, at 3:01 PM, Wayne Watson wrote:

 I've seen the tutorial, but need something more. How do I know what
 folder I'm in? How do I move from where I am to, for example,
 C:\abc\def? So far I've tried various combinations like this:

 cd ..
 cd C:\
 pwd (yes, I know it's not windows)

 I tried %cd .., and that may have moved me but I seem to get back 
 to the
 same place.

 I seem to be in  C:\Documents and Settings\administrator. If I doa %cp
 ..\\ it looks like I get to C:\, but follwing that with pwd gets me 
 back
 to where I started--C:\Documents and Settings\administrator.

 If I want to execute a program with %run, I need to be where abc.py is
 or, perhaps say something like %run C:\myPyPrograms\abc.py.
 Dir doesn't work and I haven't been able to even see what's in the 
 folder.


 -- 
  Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
 Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet

... humans'innate skills with numbers isn't much
 better than that of rats and dolphins.
  -- Stanislas Dehaene, neurosurgeon

   Web Page: www.speckledwithstars.net/


 --
  

 Join us December 9, 2009 for the Red Hat Virtual Experience,
 a free event focused on virtualization and cloud computing.
 Attend in-depth sessions from your desk. Your couch. Anywhere.
 http://p.sf.net/sfu/redhat-sfdev2dev
 ___
 Matplotlib-users mailing list
 Matplotlib-users@lists.sourceforge.net
 https://lists.sourceforge.net/lists/listinfo/matplotlib-users



 -- 
  Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
 Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 
 feet ... humans'innate skills with 
 numbers isn't much
 better than that of rats and 
 dolphins.   -- Stanislas Dehaene, 
 neurosurgeonWeb Page: www.speckledwithstars.net/




-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

 ... humans'innate skills with numbers isn't much
  better than that of rats and dolphins. 
   -- Stanislas Dehaene, neurosurgeon

Re: [Matplotlib-users] I Need a Couple of Tips for Windows to Get Started on IPython

2009-12-07 Thread Wayne Watson
Hi, I'm using IPython raw. I guess I'm not sure what a shell is in this
case. I used to work with Linux years ago and the shell concept was
clear there. I'm now simply a Win XP user. What advantages would be
available to use a shell?

In part of the thread above,(posted 57 minutes after the hour, I asked
how copy and paste operate? Quick IPyton seems to think it works quite
like a Win copy and paste. It doesn't work for me.

Below you've manage to post a session. How did that happen? Is there a
file that I can pick up that contains the log? From the ref manual, I
see this:
===


  Manual capture of command output¶
 
http://ipython.scipy.org/doc/manual/html/interactive/reference.html#manual-capture-of-command-output

If the input line begins with two exclamation marks, !!, the command is
executed but its output is captured and returned as a python list, split
on newlines. Any output sent by the subprocess to standard error is
printed separately, so that the resulting list only captures standard
output. The !! syntax is a shorthand for the %sx magic command.

Finally, the %sc magic (short for ‘shell capture’) is similar to %sx,
but allowing more fine-grained control of the capture details, and ...
===end

Maybe this is somehow you did it?

phob...@geosyntec.com wrote:
 Wayne,

 Are you using the IPython shell? If so, cd, pwd, ls, etc will work just fine.

 If you using the standard python shell, AFAIK, you need to import the os 
 module and use that to navigate.

 Ipython session:
 C:\Documents and Settings\phobsonipython
 Python 2.6.2 (r262:71605, Apr 14 2009, 22:40:02) [MSC v.1500 32 bit (Intel)]
 Type copyright, credits or license for more information.

 IPython 0.10 -- An enhanced Interactive Python.
 ? - Introduction and overview of IPython's features.
 %quickref - Quick reference.
 help  - Python's own help system.
 object?   - Details about 'object'. ?object also works, ?? prints more.

 In [1]: pwd
 Out[1]: 'C:\\Documents and Settings\\phobson'

 In [2]: cd c:\stuff\utils\py
 c:\stuff\utils\py

 In [3]: pwd
 Out[3]: 'c:\\stuff\\utils\\py'

 In [4]: cd c:\
 c:\

 In [5]: cd c:\stuff\utils\py
 c:\stuff\utils\py

 In [6]: ls *.pdf
  Volume in drive C has no label.
  Volume Serial Number is 24FD-DA13

  Directory of c:\stuff\utils\py

 09/11/2009  11:39 AM 1,515,182 elev_test5.pdf
 10/18/2009  01:06 PM   147,663 frLarch_elev.pdf
 05/12/2009  10:30 AM28,029 gear.pdf
 03/11/2009  09:56 AM30,622 test.pdf
 08/27/2009  09:18 AM17,175 tidal_cdf.pdf
 11/16/2009  08:20 AM   118,902 zoom_test.pdf
 11/16/2009  08:18 AM   124,000 zoom_test_final.pdf
7 File(s)  1,981,573 bytes
0 Dir(s)  82,894,716,928 bytes free

 Paul M. Hobson  
 Senior Staff Engineer
   

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet

 ... humans'innate skills with numbers isn't much
  better than that of rats and dolphins.
   -- Stanislas Dehaene, neurosurgeon

Web Page: www.speckledwithstars.net/



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Re: [Matplotlib-users] I Need a Couple of Tips for Windows to Get Started on IPython

2009-12-07 Thread Wayne Watson
OK, here I go. Quick Edit is checked, and I'm running from what looks 
like the Win XP command console. I am not in full screen mode. I've 
applied changes to the window. It has scroll bars side and bottom. I've 
moused the area, and now am going to Edit on the window menu. It works!  
I just pasted it into a txt file. Thanks. Pretty convoluted, but it works.

Is it possible to paste from outside? For example copy and paste from a 
txt file.

phob...@geosyntec.com wrote:
 Third Google result for copy paste in DOS prompt
 http://www.copy--paste.org/copy-paste-between-dos-windows.htm

 Note that right-clicking is going to execute behavior, not bring up a 
 contextual menu.

 -p

   
 -Original Message-
 From: Wayne Watson [mailto:sierra_mtnv...@sbcglobal.net]
 Sent: Monday, December 07, 2009 12:57 PM
 To: Gary Pajer
 Cc: matplotlib-users@lists.sourceforge.net
 Subject: Re: [Matplotlib-users] I Need a Couple of Tips for Windows to
 Get Started on IPython

 Right-click does nothing on the IPython window.

 The Windows command console is, I think, a lost cause all together. I've
 tried a right-click on it with the same result as in IPython.
 I'm using Win XP, and I hope they improve on Win 7, which I plan to
 install on all my machines this month.

 Gary Pajer wrote:
 
 On Mon, Dec 7, 2009 at 11:41 AM, Wayne Watson
 sierra_mtnv...@sbcglobal.net mailto:sierra_mtnv...@sbcglobal.net
 wrote:

 Good. Thanks. Interesting that ls and pwd are used for Win, but
   
 that's
 
 fine. How do I copy parts of the window?  All I can do at the
 moment is
 sweep out a rectangular area with the mouse. It looks like I
 underestimated the need for  automagic.



 Copy and paste from a Windows command shell is different that copy and
 paste from *nix command shell.

 Right-click in the command window
 Choose Mark from the drop-down menu
 Select the (rectangular) region of text you want to copy.
 Hit Return.

 That does a copy operation.  Then go to your other application, and
 paste however you like.





 David Arnold wrote:
  Depends on whether automagic is enabled or not. If automagic
 is OFF,
  you  need to enter the %, as in %cd. If automagic is ON (the
 default),
  then you don't need to enter the %, as in cd.
 
  automagic can be toggled on and off as follows:
 
  In [8]: automagic
 
  Automagic is OFF, % prefix IS needed for magic functions.
 
  In [9]: %automagic
 
  Automagic is ON, % prefix NOT needed for magic functions.
 
  On my mac, I can change to my home directory as follows:
 
  In [10]: cd
  /Users/darnold
 
  I can list the files in this directory with:
 
  In [11]: ls
  Desktop/Movies/context/
  Documents/Music/java.log.344
  Downloads/NetBeansProjects/java.log.415
  Dropbox/Pictures/luatex-cache/
  Library/Public/matlab_crash_dump.344
  LizThesis/Sites/matlab_crash_dump.415
 
  I can cd into my Sites folder with:
 
  In [12]: cd Sites
  /Users/darnold/Sites
 
  I can get the current directory with:
 
  In [13]: pwd
  Out[13]: '/Users/darnold/Sites'
 
  I can move up a directory level with:
 
  In [14]: cd ..
  /Users/darnold
 
 
  Hope this helps.
 
  D.
 
 
  On Dec 6, 2009, at 3:01 PM, Wayne Watson wrote:
 
  I've seen the tutorial, but need something more. How do I know
   
 what
 
  folder I'm in? How do I move from where I am to, for example,
  C:\abc\def? So far I've tried various combinations like this:
 
  cd ..
  cd C:\
  pwd (yes, I know it's not windows)
 
  I tried %cd .., and that may have moved me but I seem to get
 back to the
  same place.
 
  I seem to be in  C:\Documents and Settings\administrator. If I
 doa %cp
  ..\\ it looks like I get to C:\, but follwing that with pwd
 gets me back
  to where I started--C:\Documents and Settings\administrator.
 
  If I want to execute a program with %run, I need to be where
 abc.py is
  or, perhaps say something like %run C:\myPyPrograms\abc.py.
  Dir doesn't work and I haven't been able to even see what's in
   
 the
 
  folder.
 
 
  --
Wayne Watson (Watson Adventures, Prop., Nevada City,
   
 CA)
 
 
  (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
   Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet
 
  ... humans'innate skills with numbers isn't much
   better than that of rats and dolphins.
-- Stanislas Dehaene, neurosurgeon
 
 Web Page: www.speckledwithstars.net/
 http://www.speckledwithstars.net

[Matplotlib-users] I Need a Couple of Tips for Windows to Get Started on IPython

2009-12-06 Thread Wayne Watson
I've seen the tutorial, but need something more. How do I know what 
folder I'm in? How do I move from where I am to, for example, 
C:\abc\def? So far I've tried various combinations like this:

cd ..
cd C:\
pwd (yes, I know it's not windows)

I tried %cd .., and that may have moved me but I seem to get back to the 
same place.

I seem to be in  C:\Documents and Settings\administrator. If I doa %cp 
..\\ it looks like I get to C:\, but follwing that with pwd gets me back 
to where I started--C:\Documents and Settings\administrator.

If I want to execute a program with %run, I need to be where abc.py is 
or, perhaps say something like %run C:\myPyPrograms\abc.py.
Dir doesn't work and I haven't been able to even see what's in the folder.


-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

 ... humans'innate skills with numbers isn't much
  better than that of rats and dolphins. 
   -- Stanislas Dehaene, neurosurgeon 
 
Web Page: www.speckledwithstars.net/


--
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Re: [Matplotlib-users] Computing Simple Statistics from a Histogram

2009-12-04 Thread Wayne Watson
Hi, actually, more question was more informational than how to do it. I
wrote a function to do it, but wondered why such a function didn't seem
to exist. In my case, the histogram is from a small processor that
produces  frequency data from 307K points. Unraveling the frequency data
and returning it to original set of points seems counterproductive. The
data is produced from the pixel values in a 640x480 image.

Matthias Michler wrote:
 Hi Wayne,

 you are right all these function use the sample-data and not the pdf / 
 frequency of occurence-histogram, because typically the data is available and 
 not the pdf. Maybe the scipy mailing list could give you a solution to your 
 problem.

 In case that your freqency of occurence are integers you could do something 
 like the following to generate the sample-data and than you the previous 
 mentioned functions:
 bin_centers = np.array([ 1.,  2.,  3.,  4.,  5.])
 n_vals = np.array([1, 3, 0, 2, 1])
 sample_new = np.array([])
 for bin_center, n in zip(bin_centers, n_vals): 
 # append new value 'n' times: 
 sample_new = np.concatenate((sample_new, [bin_center]*n))

 Kind regards,
 Matthias

 On Tuesday 01 December 2009 17:51:31 Wayne Watson wrote:
   
 I do not believe that any of those calculations are based on the pdf,
 frequency of occurrence-histogram. This, (1, 2,2, 4, 2,5,4) and not this
 (1,3, 0,2,1). The latter are the frequencies of occurrence for 1,2,3,4,5.

 John Hunter wrote:
 
 On Tue, Dec 1, 2009 at 6:32 AM, Wayne Watson

 sierra_mtnv...@sbcglobal.net wrote:
   
 Is there some statistics function that computes the mean, std. dev.,
 min/max, etc. from a frequency distribution?
 
 numpy has many functions for basic descriptive statistics.  If data
 is an array of your data, you can do (import numpy as np)

 mean: np.mean(data)
 median: np.median(data)
 standard deviation: np.std(data)
 min: np.min(data)
 max: np.max(data)

 In scipy.stats, there are many more (skew, kurtosis, etc...)  See
 also, this example:


 http://matplotlib.svn.sourceforge.net/viewvc/matplotlib/trunk/py4science/
 examples/stats_descriptives.py?view=markuppathrev=4027

 JDH
   



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 Matplotlib-users@lists.sourceforge.net
 https://lists.sourceforge.net/lists/listinfo/matplotlib-users

   

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet

  The popular press and many authorities believe the number
  of pedofiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,000,
  or 115 per year. -- The Science of Fear by D. Gardner

Web Page: www.speckledwithstars.net/



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[Matplotlib-users] Computing Simple Statistics from a Histogram

2009-12-01 Thread Wayne Watson
Is there some statistics function that computes the mean, std. dev., min/max, 
etc. from a frequency distribution?

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

  The popular press and many authorities believe the number
  of pedifiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,00,
  or 115 per year. -- The Science of Fear by D. Gardner
 
Web Page: www.speckledwithstars.net/


--
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Re: [Matplotlib-users] Computing Simple Statistics from a Histogram

2009-12-01 Thread Wayne Watson
I do not believe that any of those calculations are based on the pdf, 
frequency of occurrence-histogram. This, (1, 2,2, 4, 2,5,4) and not this 
(1,3, 0,2,1). The latter are the frequencies of occurrence for 1,2,3,4,5.

John Hunter wrote:
 On Tue, Dec 1, 2009 at 6:32 AM, Wayne Watson
 sierra_mtnv...@sbcglobal.net wrote:
   
 Is there some statistics function that computes the mean, std. dev., 
 min/max, etc. from a frequency distribution?
 

 numpy has many functions for basic descriptive statistics.  If data
 is an array of your data, you can do (import numpy as np)

 mean: np.mean(data)
 median: np.median(data)
 standard deviation: np.std(data)
 min: np.min(data)
 max: np.max(data)

 In scipy.stats, there are many more (skew, kurtosis, etc...)  See
 also, this example:


 http://matplotlib.svn.sourceforge.net/viewvc/matplotlib/trunk/py4science/examples/stats_descriptives.py?view=markuppathrev=4027

 JDH

   

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

  The popular press and many authorities believe the number
  of pedofiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,000,
  or 115 per year. -- The Science of Fear by D. Gardner
 
Web Page: www.speckledwithstars.net/


--
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[Matplotlib-users] Installing iPython on Win XP

2009-11-30 Thread Wayne Watson
I downloaded ipython-0.10.win32-setup.exe and began the execution. It 
seem like it installed components. It may have brought up a download for 
ipython-0.10-py2.5.egg some minutes later. When I noticed it I thought 
maybe I accidentally triggered its appearnace from the Start menu. I 
tried ipython from the menu to see what it might look like. I got a 
console window with messages of various kinds about a successful install 
and some general comments about features. It stated I should hit Enter 
to continue. That did nothing. I closed the window. What next?

Am I supposed to install the egg file? I thought I'd download it and 
try, but Win doesn't recognize it.

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

  The popular press and many authorities believe the number
  of pedifiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,00,
  or 115 per year. -- The Science of Fear by D. Gardner
 
Web Page: www.speckledwithstars.net/


--
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[Matplotlib-users] What's Wrong with this Histogram?

2009-11-30 Thread Wayne Watson
I'm working with a Python program that produces freq below. There are 32 
bins. The bins represent 0-7, 8-14, ..., 248 - 255 of a set of 
frequencies (integer counts). 0 to 255 are the brightness pixel values 
from a 640x480 frame of b/w pixels. I binned 8 into each of 32 bins. One 
can easily see that the various bins are of a different height. However, 
the result is fixed height bar from 0 to 10, and a shorter single bar 
from about 120 to 130. The x-scale goes from 0 to 140 and not from 0 to 
255, or somewhere in that range. It seems like hist is clumping 
everything into two groups. I've changed the range parameter several 
times and get the same result. I'd send an attachment of the figure, but 
that often seems to delay a post in most of these Python mail lists.

freq  =  [127516, 8548, 46797, 46648, 21085, 9084, 7466, 6534, 5801, 
5051, 4655, 4168, 4343, 3105, 2508, 2082, 1200, 488, 121, 0, 0, 0, 0, 0, 
0, 0, 0, 0, 0, 0, 0, 0]
fig = pylab.figure()
v = array(freq)
plt.hist(v, bins=linspace(0,256,nplt_bins+1), normed=1, range=(30,200))
pylab.show()

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

  The popular press and many authorities believe the number
  of pedifiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,00,
  or 115 per year. -- The Science of Fear by D. Gardner
 
Web Page: www.speckledwithstars.net/


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Re: [Matplotlib-users] What's Wrong with this Histogram?

2009-11-30 Thread Wayne Watson
That helped by using the original data of 256 elements.  So all the 
large values in the array beyond 120  would be tiny bars stretched out 
to x of about  127516.  OK, now  with the original  256 elements I see 
some problems.

Individually, they contain some high counts, so I guess they are going 
off scale.  This is unfortunate,  since  the original data was put into 
256 bins by  hardware from 307,000 + values. It looks like what I should 
be feeding hist, but recreating the 307K from the 256 seems something of 
a waste in that it is undoing what the hardware did. Is there some graph 
function that will treat the input as already binned? For example, if I 
have [10, 7, 5], I want to see a histogram of three bars, one at x =0 of 
height 10, one at x=1 of height 6, and 2 of height 5.  x might be some 
other numbers like 18.2, 46.3 and 60.1.

Pierre de Buyl wrote:
 Hello,

 hist takes the raw data directly, and not a histogram already computed.

 If data is an array containing your pixels,
 hist(data, bins = range(0,255,8) , normed=True) should do what you expect

 The code you sent adequately counts 13 occurences for 0 in freq and 
 one at 121, with some rescaling.

 Pierre

 Le 30 nov. 09 à 16:52, Wayne Watson a écrit :

 I'm working with a Python program that produces freq below. There are 32
 bins. The bins represent 0-7, 8-14, ..., 248 - 255 of a set of
 frequencies (integer counts). 0 to 255 are the brightness pixel values
 from a 640x480 frame of b/w pixels. I binned 8 into each of 32 bins. One
 can easily see that the various bins are of a different height. However,
 the result is fixed height bar from 0 to 10, and a shorter single bar
 from about 120 to 130. The x-scale goes from 0 to 140 and not from 0 to
 255, or somewhere in that range. It seems like hist is clumping
 everything into two groups. I've changed the range parameter several
 times and get the same result. I'd send an attachment of the figure, but
 that often seems to delay a post in most of these Python mail lists.

 freq  =  [127516, 8548, 46797, 46648, 21085, 9084, 7466, 6534, 5801,
 5051, 4655, 4168, 4343, 3105, 2508, 2082, 1200, 488, 121, 0, 0, 0, 0, 0,
 0, 0, 0, 0, 0, 0, 0, 0]
 fig = pylab.figure()
 v = array(freq)
 plt.hist(v, bins=linspace(0,256,nplt_bins+1), normed=1, range=(30,200))
 pylab.show()

 -- 
Wayne Watson (Watson Adventures, Prop., Nevada City, CA)



-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

  The popular press and many authorities believe the number
  of pedifiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,00,
  or 115 per year. -- The Science of Fear by D. Gardner
 
Web Page: www.speckledwithstars.net/


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Re: [Matplotlib-users] Installing iPython on Win XP

2009-11-30 Thread Wayne Watson
Looking a little further at this problem it looks like iPython was 
installed. I mis-interpreted some lines at the bottom. The very bottom 
one showed [1]. I didn't recognize that as a line prompt.  The next 
question is whether one can accept a  complete program. I suspect this 
is a purely interactive program, and it's total interface is the  DOS 
like console?  I see one must use properties of the Window to change its 
size.  I would think there would  be a way to make these the same each 
time?  I think there's a tutor for this,  so it looks like I need to 
visit it.

Wayne Watson wrote:
 I downloaded ipython-0.10.win32-setup.exe and began the execution. It 
 seem like it installed components. It may have brought up a download for 
 ipython-0.10-py2.5.egg some minutes later. When I noticed it I thought 
 maybe I accidentally triggered its appearnace from the Start menu. I 
 tried ipython from the menu to see what it might look like. I got a 
 console window with messages of various kinds about a successful install 
 and some general comments about features. It stated I should hit Enter 
 to continue. That did nothing. I closed the window. What next?

 Am I supposed to install the egg file? I thought I'd download it and 
 try, but Win doesn't recognize it.

   

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

  The popular press and many authorities believe the number
  of pedifiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,00,
  or 115 per year. -- The Science of Fear by D. Gardner
 
Web Page: www.speckledwithstars.net/


--
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Re: [Matplotlib-users] What's Wrong with this Histogram?

2009-11-30 Thread Wayne Watson
Another related question. is there some statistics function that 
computes the mean, std. dev., min/max, etc. from a frequency distribution?

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

  The popular press and many authorities believe the number
  of pedifiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,00,
  or 115 per year. -- The Science of Fear by D. Gardner
 
Web Page: www.speckledwithstars.net/


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Re: [Matplotlib-users] A Simple Example of histogram Using Range?

2009-11-29 Thread Wayne Watson
I'm on Win XP, and have no idea where the images went. I guess I'll have
to search my C-disk. I just began the search.

Looking at C:\Python25, I see no image files. Same with C:\Python25\Scripts

If I put some code up front as below, the image comes up on my screen,
but using a range of 0 to 8 and 0, 18 changes nothing. Further the
program hangs up.

So far matplotlib pretty much leaves the user on his own. Yes, there are
plenty of examples, but there seem to be no explanations about matters
like figure or show. No tutor on any of this I guess. Apparently, they
are leaving it up to one's MATLAB experience. It's been quite awhile
since I used that. It still resides on my computer.

Ah, the png files were found in the folder where the program is located.
I can clearly see the changes from your switches between range values.

=inserted a few lines at the top and some print debug
stmts=
import matplotlib.pyplot as plt
print let's start the histogram
plt.hist([1, 2, 3, 4, 5], range=(0, 18))
plt.show()
#raw_input(Hey)
fig = plt.figure()
plt.hist([1, 2, 3, 4, 5], range=(0, 20))
plt.show()
plt.savefig(hist_0_20.png)
plt.close(fig)

fig = plt.figure()
plt.hist([1, 2, 3, 4, 5], range=(0, 8))
plt.savefig(hist_0_8.png)
plt.close(fig)
print finished

Johan Grönqvist wrote:
 Wayne Watson skrev:
   
 Anyway, where, folder, does your program write the files? I'm not
 familiar with figure, but apparently using it produces some canvas
 that plt.hist places it's output on. One can than save fig to a file.
 What happens if I don't use figure? I just put a copy of the line
 plt.hist([1, 2, 3, 4, 5], range=(0, 20)) after import. When I execute
 the program, I don't see a graphic appear. So doesn't matplotlib produce
 graphic output aside from use of figure?

 

 My intuition is exactly like that.

 After importing matplotlib.pyplt as plt, plt.figure creates an object 
 that acts as canvas, and then I plot various things (hist, is one 
 example), and when I am satisfied, I plt.savefig(path) or plt.show() the 
 figure. The figures are saved in the directory where the script is run 
 (its cwd, or current working directory, on linux).

 I have also used hist without having a figure, but that was because I 
 wanted the histogram data, i.e., the numbers of data points in the 
 different bins. That script used plt.hist to generate such data, and 
 later (after running fig = plt.figure) used plt.plot to plot parts of 
 the data in different ways.

 By the way, matplotlib.pyplot is one way of using matplotlib. There is 
 also the object oriented interface, which I have never used.





 / johan


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  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet

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[Matplotlib-users] Object Module is not callable, traceback

2009-11-29 Thread Wayne Watson
I have a fairly large program that uses pylab and company. I want to use 
the matplot histogram function. Here are the declarations at the start. 
I added import matplotlib as mpl
-start
from Tkinter import *
from numpy import *
import numpy
import pylab
import Image
import ImageChops
import ImageTk
import time
import binascii
import tkMessageBox
import tkSimpleDialog
from pylab import plot, xlabel, ylabel, title, show, xticks, bar
import matplotlib as mpl  -- added

from tkFileDialog import asksaveasfilename
from tkFileDialog import askopenfilename

import MakeQTE

import socket

... 500 lines of code

 I've added the follow code in a function
print pltx_bins: , pltx_bins
print Off to pylab: , plt_bins[0:nplt_bins]
fig = mpl.figure()
v = array(plt_bins)
print v is: ,v
print edges --, linspace(0,256,nplt_bins+1)
mpl.histogram(v, bins=linspace(0,256,nplt_bins+1), normed=1)# 
matplotlib version (plot)
mpl.show()
print end of histogram output
# end of function
-end
The program dies at fig = figure() with:
Exception in Tkinter callback
Traceback (most recent call last):
  File C:\Python25\lib\lib-tk\Tkinter.py, line 1403, in __call__
return self.func(*args)
  File 
C:\Sandia_Meteors\Sentinel_Development\Development_Sentuser+Utilities\sentuser\sentuser_20090103+hist.py,
 
line 504, in ShowHistogram
fig = mpl.figure()
TypeError: 'module' object is not callable

What's the problem here?


-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

   350 350 350 350 350 350 350 350 350 350
 Make the number famous. See 350.org
The major event has passed, but keep the number alive.
 
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Re: [Matplotlib-users] Object Module is not callable, traceback

2009-11-29 Thread Wayne Watson


Eric Firing wrote:
 Wayne Watson wrote:
 I have a fairly large program that uses pylab and company. I want to 
 use the matplot histogram function. Here are the declarations at the 
 start. I added import matplotlib as mpl
 -start
 from Tkinter import *
 from numpy import *
 import numpy
 import pylab
 import Image
 import ImageChops
 import ImageTk
 import time
 import binascii
 import tkMessageBox
 import tkSimpleDialog
 from pylab import plot, xlabel, ylabel, title, show, xticks, bar
 import matplotlib as mpl  -- added

 from tkFileDialog import asksaveasfilename
 from tkFileDialog import askopenfilename

 import MakeQTE

 import socket

 ... 500 lines of code

  I've added the follow code in a function
 print pltx_bins: , pltx_bins
 print Off to pylab: , plt_bins[0:nplt_bins]
 fig = mpl.figure()
 v = array(plt_bins)
 print v is: ,v
 print edges --, linspace(0,256,nplt_bins+1)
 mpl.histogram(v, bins=linspace(0,256,nplt_bins+1), normed=1)# 
 matplotlib version (plot)
 mpl.show()
 print end of histogram output
 # end of function
 -end
 The program dies at fig = figure() with:
 Exception in Tkinter callback
 Traceback (most recent call last):
   File C:\Python25\lib\lib-tk\Tkinter.py, line 1403, in __call__
 return self.func(*args)
   File 
 C:\Sandia_Meteors\Sentinel_Development\Development_Sentuser+Utilities\sentuser\sentuser_20090103+hist.py,
  
 line 504, in ShowHistogram
 fig = mpl.figure()
 TypeError: 'module' object is not callable

 What's the problem here?



 figure(), show(), etc. are pylab (or matplotlib.pyplot) functions, not 
 matplotlib functions.

 Especially for a long program, it is strongly recommended that you not 
 use from numpy import *.  The recommended form is

 import numpy as np
 import matplotlib.pyplot as plt

 It will help you keep a clear picture of where various types of 
 functionality are coming from.  See also 
 http://matplotlib.sourceforge.net/faq/usage_faq.html
 and note that a primarily object-oriented approach is recommended for 
 use in other than quick scripts and interactive plotting.

 Eric

Thanks. Well, that explains a lot! functions in the wrong place.

I'm pretty new to this stuff, so what belongs where is sometimes 
unclear. I'll check out the sourceforge tip. I didn't write the program. 
I'm just trying to add some features. Changing the import for matplotlib 
got the graphics window up.
import matplotlib.pyplot as plt

When I ran it, it was followed by this traceback:
start
Exception in Tkinter callback
Traceback (most recent call last):
  File C:\Python25\lib\lib-tk\Tkinter.py, line 1403, in __call__
return self.func(*args)
  File 
C:\Sandia_Meteors\Sentinel_Development\Development_Sentuser+Utilities\sentuser\sentuser_20090103+hist.py,
 
line 508, in ShowHistogram
plt.histogram(v, bins=linspace(0,256,nplt_bins+1), normed=1)# 
matplotlib version (plot)
AttributeError: 'module' object has no attribute 'histogram'
---end
508 line is the histogram. Who's complaining? ShowHistogram?  I don't 
believe I should be using hist here instead of histogram.

Off to sourceforge.

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

  The popular press and many authorities believe the number
  of pedifiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,00,
  or 115 per year. -- The Science of Fear by D. Gardner
 
Web Page: www.speckledwithstars.net/


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Re: [Matplotlib-users] Object Module is not callable, traceback

2009-11-29 Thread Wayne Watson
Eric Firing wrote:

 I'm pretty new to this stuff, so what belongs where is sometimes 
 unclear. I'll check out the sourceforge tip. I didn't write the 
 program. I'm just trying to add some features. Changing the import 
 for matplotlib got the graphics window up.
 import matplotlib.pyplot as plt

 When I ran it, it was followed by this traceback:
 start
 Exception in Tkinter callback
 Traceback (most recent call last):
   File C:\Python25\lib\lib-tk\Tkinter.py, line 1403, in __call__
 return self.func(*args)
   File 
 C:\Sandia_Meteors\Sentinel_Development\Development_Sentuser+Utilities\sentuser\sentuser_20090103+hist.py,
  
 line 508, in ShowHistogram
 plt.histogram(v, bins=linspace(0,256,nplt_bins+1), normed=1)# 
 matplotlib version (plot)
 AttributeError: 'module' object has no attribute 'histogram'
 ---end
 508 line is the histogram. Who's complaining? ShowHistogram?  I don't 
 believe I should be using hist here instead of histogram.

 histogram is a numpy function, not a pyplot function.  Pyplot has a 
 hist which uses numpy.histogram to do the calculation, and then plots 
 it.  It does look like plt.hist is what was intended in your code.

 For tracking down such things, there is no substitute for working 
 interactively with ipython.  If you are not already familiar with it, 
 taking a little time to get it running and learn the basics (like tab 
 completion and appending ? or ?? to function names to get docstrings + 
 origins, and source code, respectively) will pay big dividends.

 Eric
These dependencies sure are tricky. I changed it to plt:hist, and that 
got me a histogram plot. I think some of my parameters need work, but 
it's close to what I expected. When I closed the graph and finally the 
program, the shell (IDLE) did not provide a  prompt, nor did it 
produce my print of End of Histogram that followed plt.hist. Closing 
the shell revealed something was still running.  I may have to go to the 
console for execution to see what that's about.

I've heard of ipython. It looks like I should give it a try. Examples 
for matplotlib abound, but not much about how MATLAB concepts like 
figure shows up anywhere. Is that all in pylab docs?

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

  The popular press and many authorities believe the number
  of pedifiles that prowl the web is 50,00. There are no
  figures that support this. The number of children below
  18 years of age kidnapped by strangers is 1 in 600,00,
  or 115 per year. -- The Science of Fear by D. Gardner
 
Web Page: www.speckledwithstars.net/


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[Matplotlib-users] A Simple Example of histogram Using Range?

2009-11-28 Thread Wayne Watson
See Subject. I don't seem able to produce a simple example of using 
histogram that uses range. I tried a variety of ranges, range=(0,22), 
range=(0, 50.2), ... and I see no difference between any of the x values 
scale. Can someone provide an example that shows how it works?

-- 
   Wayne Watson (Watson Adventures, Prop., Nevada City, CA)

 (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
  Obz Site:  39° 15' 7 N, 121° 2' 32 W, 2700 feet  

   350 350 350 350 350 350 350 350 350 350
 Make the number famous. See 350.org
The major event has passed, but keep the number alive.
 
Web Page: www.speckledwithstars.net/


--
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