Re: [Matplotlib-users] matplotlib threadsafe?
Out of interest, how does one tell MPL to start a new figure and forget everything that's gone before? You can minimize the amount of package and module-level state information by using the oo interface: see examples/agg_oo.py. If you change any rcParams dictionary entries, typically using the rc function, then you can restore the dictionary to its default condition with the rcdefaults() function. Eric - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] compiling from svn on windows
Chris Withers wrote: Michael Droettboom wrote: That's cool'n'all, but when is svn going to make it into a Windows binary release? ;-) I suspect your question is somewhat rhetorical, but... it will probably be a while ;) Why is that? Who cranks out the binary releases on Windows and what compiler do they use? I know a lot of people (myself included) have had success with MinGW. What's the official compiler used, though? It's a good learning experience, and there's lots on this list willing to help. If we can get more SVN Windows users on board, more crazy Windows-only bugs will get found and squashed sooner... ;) Well, tell me how to get the svn trunk and how to compile and I'll give it a go :-) Assuming you have svn installed on your machine, start here: http://sourceforge.net/svn/?group_id=80706 You will probably want to modify the checkout command slightly, something like this: svn co https://matplotlib.svn.sourceforge.net/svnroot/matplotlib/trunk/matplotlib mpl_svn (That should be all one line, but the mailer may have broken it.) There are some Windows-related compilation hints in the INSTALL.txt file and in setupext.py. I think the basic idea is that once you have all prerequisites in place, complete with header files, then the standard python setup.py install will do the right thing. The hard part is probably getting all the prerequisites installed. I've never tried on Win, so I don't know. Charlie Moad does the Windows releases. I don't know what compiler he uses. It would be nice if some people who have successfully built on Windows could collectively assemble a step-by-step account of how to go from a bare Win box to a working mpl (preferably compiled with mingw); but maybe this would take more effort than it is worth. I am on shaky ground suggesting it, because it is not something I can help with at all, and I don't even have a clear picture of what it would require. I gather a similar account would be useful for OS X. Eric cheers, Chris - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Install problem on Leopard
On Fri, Mar 21, 2008 at 10:13 AM, Christopher Barker [EMAIL PROTECTED] wrote: Compiling Matplotlib from source, or easy_installing the egg From the egg: ld: in /sw/lib/libJPEG.dylib, file is not of required architecture for hmm -- odd, I wouldn't think the egg should be linked against what looks like a macports libJPEG -- are you sure it isn't trying to build the egg when you easy_install? Looking back over the easy_install output it looks as if it does download another tarball and try to build it. I read another thread where this was happening to someone else. I'll look at other libJPEGs - if that doesn't make it fly I might need to take your other advice and nuke macpython. I'm a little hesitant about over-writing the system installed numpy though. Andrew - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] from pylab import nx?
Chris Withers wrote: Eric Firing wrote: If you are referring to scripts in the matplotlib/examples/ subdirectory then you must have a version in which some of those scripts had not been brought up to date with the rest of matplotlib. You should turn them into unit tests as well as examples. The backend_driver.py example runs a number of other examples using a number of different backends. That's been a reasonably successful set of regression and coverage tests. It's not perfect, but it's a start. There are also some lower-level unit tests for frequently-reoccurring bugs in the unit directory. Mike -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] compiling from svn on windows
Chris Withers wrote: Michael Droettboom wrote: That's cool'n'all, but when is svn going to make it into a Windows binary release? ;-) I suspect your question is somewhat rhetorical, but... it will probably be a while ;) Why is that? Who cranks out the binary releases on Windows and what compiler do they use? Matplotlib recently underwent a major refactoring of the code to make it easier to add new transformations and projections to the system. This code is significantly less tested than the latest release. The idea of a release is that it is reasonably well-tested and reasonably stable. Obviously, the matplotlib releases aren't perfect, but I suspect 0.91.2 is far more safe and predictable than SVN trunk is right now. However, there is a branch, matplotlib_0_91_maint, that *theoretically* should be the latest release + any important bugfixes, but no new features. I say *theoretically* because occasionally bugfixes are made only to the trunk. If you find such a fix, let us know and hopefully someone can backport it. Mike -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] BUG: Log axes are upside down with PDF output...
I vaguely recall a bug whereby mathtext on PDF was upside down (because
the direction of the y-axis was not being inverted)... but I can't find
the bug report.
It does seem to work in 0.90.1 and 0.91.2 (on Linux at least). Are you
able to upgrade?
Cheers,
Mike
Simson Garfinkel wrote:
Hi. I'm making scientific graphs again, so i just got back on this
mailing list after a two year hiatus.
I am using:
matplotlib-0.90.0-py2.5-macosx-10.4-fat.egg
Here is a simple program:
#!/usr/bin/python
#
# Do our plots with matplotlib
import matplotlib
matplotlib.use('Agg')
from pylab import *
fig = figure(num=1,figsize=(6.5,4))
ax = fig.add_axes([.15,.3,.8,.65])
ax.set_title(Why is the Y axes upside down?)
ax.set_yscale('log')
ax.set_ylabel('Queries per second')
ax.bar(1,1000,.5,color='r')
ax.bar(2,5000,.5,color='b')
ax.bar(3,55000,.5,color='g')
fig.savefig(broken_log_demo.png)
Here is the plot with a PNG:
Well, that looks good.
But here is the plot when I change the type to PDF:
Notice the the axes are reversed.
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Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA
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Re: [Matplotlib-users] compiling from svn on windows
Chris: I have used cygwin to compile numpy and scipy svn versions for win XP on my old athlon system. I believe the scipy site has some detailed instructions. However, I have done a lot of compiling on my linux system and so that part was easy (configure, make, make install, etc) I don't know about mpl but scipy for sure was very sensitive to the platform and the stock scipy distro blew up big time doing curve fitting optimizations. Compiling my own versions made those problems go away, thankfully. You can download cygwin and install it easily enough but then you need to pick which of the included programs to install and that is a pain unless you have disk space and can do everything. For numpy and scipy I did the following in the cygwin prompt after cd-ing to where I keep my sources: /cygdrive/c/python25/python.exe setup.py config --compiler=mingw32 build \ --compiler=mingw32 bdist_wininst and this produced a windows .exe installer. I tried mpl last night and it failed due to some dependencies, I think it was freetype that was missing and I couldn't satisfy the requirements but maybe someone on the list can enlighten us. With that taken care of, it should be straightforward. Wayne Chris Withers wrote: Michael Droettboom wrote: That's cool'n'all, but when is svn going to make it into a Windows binary release? ;-) I suspect your question is somewhat rhetorical, but... it will probably be a while ;) Why is that? Who cranks out the binary releases on Windows and what compiler do they use? I know a lot of people (myself included) have had success with MinGW. What's the official compiler used, though? It's a good learning experience, and there's lots on this list willing to help. If we can get more SVN Windows users on board, more crazy Windows-only bugs will get found and squashed sooner... ;) Well, tell me how to get the svn trunk and how to compile and I'll give it a go :-) cheers, Chris - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Plotting dates on the Y axis?
All, Is it possible to plot dates on the Y-axis? I'd like to have dates on the y axis descending or ascending versus my values on the x - axis. Is it possible to do this or simply switch the axis? Thanks! Regards, Ken - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Plotting dates on the Y axis?
Kenneth Miller wrote: Is it possible to plot dates on the Y-axis? I'd like to have dates on the y axis descending or ascending versus my values on the x - axis. Is it possible to do this or simply switch the axis? Not sure what you mean, have you just tried it with plot or plot_dates? What problems are you experiencing? cheers, Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] compiling from svn on windows
Eric Firing wrote: It would be nice if some people who have successfully built on Windows could collectively assemble a step-by-step account of how to go from a bare Win box to a working mpl (preferably compiled with mingw); but maybe this would take more effort than it is worth. I don't think so -- that would be great! I gather a similar account would be useful for OS X. It would, and it's been done at various times by various people (myself included, a good while back). I don't know if there is a recent one out there. both of these should be in an easy-to-find place on the Wiki. As for OS-X: OS-X is a pain in the ^%^ because Apple doesn't include all the libs MPL needs (I'm not up to date on this, but I think libpng, libjpeg and libfreetype). On Windows, this is also the case, but I understand that the MPL distro includes them. On OS-X, it is just easy enough to get them elsewhere that there isn't the motivation to get them included in MPL. However, the problem comes in that there are way too many ways to get these libs on OS-X: - compile from a tarball - fink - macports - various binary installers. Also, even with these methods, there are issues of how they compiled: Intel, PPC, or Universal. Ideally, we'd all use the same Universal libs, but the fact is that it it easier to get it running on your own machine by using fink or macport or the tarball, and building just for your system, but then you dont' get something fully redistributable. Further complicating all this is that there are way too many versions of Python for OS-X: Framework, fink, macports, activestate, Apple's, MacPython, etc. Personally, I'd really like there to be a decision about what is supported by MPL, and I think that should be: MacPython2.5 (for OS-X 10.3.9 to 10.5) Universal Builds Extra libs statically linked in. Most recent numpy release. Tk and wx back-ends Cocoa? (is that functional?) It's a bit of pain to get set up to build this, but once you're set up, it's easy to do and distribute it an everyone can use it. Also, I THINK it's possible to build a binary distro (egg?) that will work with both MacPython2.5 and Apple's 25 (which comes with OS-X 10.5). Can anyone confirm this? Either easy_install or *.dmgs (build with bdist_mpkg) that can be downloaded and clicked on would be fine. The wxPython project supports OS-X builds like this, and it works great. fink and macports can do their own thing. Is there currently an appropriate place in the Wiki for How to install on OS-X ? After all that writting, I see: matplotlib-0.91.2-py2.5-macosx-10.3-fat.egg on the sourceforge download site -- this looks like it's just what I'm suggesting. If that didn't work for the OP, we should figure out why not. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/ORR(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plotting filled lines with missing data?
Pierre GM wrote: Your data is indexed in time, right ? Your x-axis is a date object ? Then use scikits.timeseries http://scipy.org/scipy/scikits/wiki/TimeSeries I'm not sure what this is giving me. The dates are all python datetimes in a list already. The missing values started off as '', I turned those into nan and then created a ma with the nan's masked. What more would TimeSeries give me? the link above. I must admit we didn't implement poly_between for timeseries. Most likely, we'd have to implement it for regular masked arrays first, as mentioned by Eric. OK. What you could do is to fill your array with some kind of baseline, such as 0, or your minimum data, or wtvr. That's just a quick trick and no fix. Indeed, that's what I had to do. I have to admit, I see some interesting things while scanning that wiki page, but nothing that would have helped me... cheers, Chris (who might well be missing something...) -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Install problem on Leopard
Andrew Charles wrote: Looking back over the easy_install output it looks as if it does download another tarball and try to build it. I read another thread where this was happening to someone else. What did you try to install? was it this: matplotlib-0.91.2-py2.5-macosx-10.3-fat.egg which I think should work, so if it doesn't, maybe we can figure out why not. It worked for me with MacPython2.5 on OS-X 10.4 Charlie, am I right that that should work? I'll look at other libJPEGs - if that doesn't make it fly I might need to take your other advice and nuke macpython. I'm a little hesitant about over-writing the system installed numpy though. I agree. MacPython is a good way to go, and we should have a binary for it, so maybe we can solve this. I don't have Leopard, so I'm not sure I can help much though. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/ORR(206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Plotting dates on the Y axis?
On Fri, Mar 21, 2008 at 11:27 AM, Kenneth Miller [EMAIL PROTECTED] wrote:
All,
Is it possible to plot dates on the Y-axis? I'd like to have
dates on the y axis descending or ascending versus my values on the x
- axis. Is it possible to do this or simply switch the axis?
Not a problem -- with recent versions of mpl, you can simply pass a
sequence of date objects directly. Use Axes.invert_yaxis to change
the order from ascending to descending. Here is an example loading
some data from a CSV file and plotting floats on the x axis and dates
on the y axis
In [7]: import matplotlib.mlab as mlab
In [8]: r = mlab.csv2rec('aapl.csv')
In [9]: r.sort()
In [10]: r[-5:]
Out[10]:
recarray([ (datetime.date(2008, 2, 11), 128.00,
129.97, 127.2, 129.44, 42886900,
129.44),
(datetime.date(2008, 2, 12), 130.69, 131.0, 123.62,
124.86, 43749900, 124.86),
(datetime.date(2008, 2, 13), 126.680001, 129.78,
125.63, 129.41, 34542300, 129.41),
(datetime.date(2008, 2, 14), 129.41,
130.81, 127.010001, 127.45, 34074900,
127.45),
(datetime.date(2008, 2, 15), 126.27, 127.08, 124.06, 124.63,
32163400, 124.63)],
dtype=[('date', '|O4'), ('open', 'f8'), ('high', 'f8'),
('low', 'f8'), ('close', 'f8'), ('volume', 'i4'), ('adj_close',
'f8')])
In [11]: fig = figure()
In [12]: ax = fig.add_subplot(111)
In [13]: ax.plot(r.close, r.date, 'o')
Out[13]: [matplotlib.lines.Line2D instance at 0x237fc10]
In [14]: draw()
In [15]: ax.invert_yaxis()
In [16]: draw()
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Re: [Matplotlib-users] Plotting dates on the Y axis?
On Mar 21, 2008, at 11:56 AM, Chris Withers wrote: Kenneth Miller wrote: Is it possible to plot dates on the Y-axis? I'd like to have dates on the y axis descending or ascending versus my values on the x - axis. Is it possible to do this or simply switch the axis? Not sure what you mean, have you just tried it with plot or plot_dates? A common type of graph in my work is to see the value (from 0 to something) represented on the x axis, and instead of the y representing a value, it represents time. The closer the Y value gets to the x-axis, the closer it is to the current time, and the further away the further back in time. When i pass plot_dates timestamps for the y axis, and integers for the x axis it simply displays the y-axis as floats. Regards, Kenneth Miller What problems are you experiencing? cheers, Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Plotting dates on the Y axis?
Kenneth Miller wrote: back in time. When i pass plot_dates timestamps for the y axis, and integers for the x axis it simply displays the y-axis as floats. did you try: plot_dates(x,dates,ydate=True) ? Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] from pylab import nx?
Chris Withers wrote: Michael Droettboom wrote: The backend_driver.py example runs a number of other examples using a number of different backends. That's been a reasonably successful set of regression and coverage tests. It's not perfect, but it's a start. There are also some lower-level unit tests for frequently-reoccurring bugs in the unit directory. Indeed, is there any kind of full unit test suite that a developer can run when changing things ot make sure they haven't fubarred anything? backend_driver.py is, AFAIK, the closest thing to that. I recently did a coverage analysis of it (with coverage.py), and it hits something like 98% of the non-error case code, so it's pretty good. What we don't have is an automated regression test framework to see if the results remain correct. There are a number of reasons why this is a non-trivial task -- there was a thread about that on this list a few months ago. Unfortunately, I can't find it... Maybe someone else remembers the subject line? Mike -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] 'from matplotlib.cbook import is_scalar, dedent' ImportError: cannot import name dedent
Hello List, I am using python-matplotlib version 0.87.7-0.3ubuntu1(feisty) and having some problems with a script that uses it. I get this import error and am not sure how to debug it further, any assistance would be greatly appreciated. Best regards, Paul marsh - crank examples # pwd /home/a_downloads/basemap-0.9.9.1/examples crank examples # python simpletest.py Traceback (most recent call last): File simpletest.py, line 1, in module from matplotlib.toolkits.basemap import Basemap File /usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/__init__.py, line 1, in module from basemap import __doc__, __version__ File /usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/basemap.py, line 20, in module from matplotlib.cbook import is_scalar, dedent ImportError: cannot import name dedent crank examples # python -c from matplotlib.toolkits.basemap import basemap_datadir; Traceback (most recent call last): File string, line 1, in module File /usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/__init__.py, line 1, in module from basemap import __doc__, __version__ File /usr/lib/python2.5/site-packages/matplotlib/toolkits/basemap/basemap.py, line 20, in module from matplotlib.cbook import is_scalar, dedent ImportError: cannot import name dedent crank examples # - - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Vary point color with scatter
Hi list, I have a set of data with 3 columns : x = x coordinate of the point y = y coordinate z = temperature I can't see how to set a different color for each point function of temperature value. I have tried, which draw a colorfull beautiful map, the color varying with the row rank of x (not what I want) ** sqla=SELECT x, y, temperature FROM import_parcelle a WHERE dat_loc=' + date_traite + ' AND code_uc=' + code_uc + ' ORDER BY a.dateheure; resa=db.query(sqla) data=resa.dictresult() x= [float(a[x]) for a in data] # -- extraction de la colonne x y= [float(a[y]) for a in data] # -- extraction de la colonne y z= [float(a[temperature]) for a in data] # -- extraction de la colonne temperature scatter(x, y, c=arange(len(x)), cmap=cm.spring) title(Carte des temperatures(L/min)) xlim(min(x)-10,max(x)+10) ylim(min(y)-10,max(y)+10) ** What is the good way to do what I reach for ? I have much trouble to know how to define the c parameter of scatter. I saw the arrange thing somewhere in internet, but don't understand what it is for. Thanks in advance for your help. Michael - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Scatterplot problem
Okay I've learnt a bit more about this:
http://img229.imageshack.us/img229/6467/scatterplot5st6.png
I need to explicitly make a new figure as well as a new axis, and put
the rc calls before the figure calls, rc changes only seem to take
effect on figures created afterwards. Also I was stupidly using the plot
function (for plotting lines) for a scatter plot, I've now discovered
the scatter function.
Things are pretty much how I want them now, but I still have a couple of
questions:
How do I get rid of the redundant ticks on the top and right edges?
Is there any way to stop some of my text labels from overlapping?
Why is there such a big gap between the plot itself and the axes ticks?
The scatter function seems to do this, but I don't see any option to
control the size of the gap. I wonder if I've done something weird like
create an axes within an axes. I don't mind the gap much, it's just
surprising, and could do with being much smaller to make the figure
easier to read.
Here's my new source code:
rc('xtick.major',size=8)
rc('xtick',direction='out')
rc('ytick.major',size=8)
rc('ytick',direction='out')
fig = figure(facecolor='white' )
axes(frameon=False)
title('Comparison of lower- and upper-bounds per function in week one
and week two')
l =
scatter(functions.lowerboundsweek1,functions.lowerboundsweek2,marker='s',color='g')
u =
scatter(functions.upperboundsweek1,functions.upperboundsweek2,marker='^',color='b')
legend((l,u),('Lower-bounds','Upper-bounds'),'best')
plot([0,1],[0,1],color='#99',linestyle='--')
xlabel('Week 1')
ylabel('Week 2')
xticks(functions.upperboundsweek1+functions.lowerboundsweek1,'
'*len(functions.upperboundsweek1+functions.lowerboundsweek1))
yticks(functions.upperboundsweek2+functions.lowerboundsweek2,'
'*len(functions.upperboundsweek2+functions.lowerboundsweek2))
for function,x,y in
map(None,functions.shortnames,functions.upperboundsweek1,functions.upperboundsweek2):
annotate(function,xy=(x,y),size=8,color='b')
for function,x,y in
map(None,functions.shortnames,functions.lowerboundsweek1,functions.lowerboundsweek2):
annotate(function,xy=(x,y),size=8,color='g')
On Tue, 2008-02-26 at 16:51 +, chombee wrote:
I'm having a couple of problems drawing a basic relational scatter plot.
(Specifically, it's called a dot-dash-plot in the book I have and is
described as framing the bivariate scatter with the marginal distribution
of each variable.) The idea is that you have a bivariate scatter plot
and use the two marginal frequency distributions of the data as the two
axes.
1. By setting the x and y tick length and using space characters as the
tick labels I was able to get ticks only and no labels on the axes as I
want. But these ticks appear along the top and right edges of the plot,
as well as the left and bottom. Is there any way to get rid of the top
and right ticks?
2. I'm getting phantom numbers on my axes, the 0.2, 0.4, 0.6 etc. I
don't know where these are coming from or what they measure (my data
ranges from 0-7 on both axes, not 0-1).
3. I want to label each data point with a string. I'm doing this with
annotate but the strings sometimes overlap each other. Any idea how to
avoid this?
Here's a PNG of my plot as it is:
http://img137.imageshack.us/img137/4015/scatterplotlk2.png
And here's the source:
# datax and datay are equal length lists of floats, the data I want to
# plot. labels is another equal length list containing the strings I
# want to label the data points with. All three lists are in the same
# order.
axes(frameon=False)
rc('xtick.major',size=8)
rc('xtick',direction='out')
xticks(datax,' '*len(datax))
rc('ytick.major',size=8)
rc('ytick',direction='out')
yticks(datay,' '*len(datay))
plot(datax,datay,'r.')
plot([0,7],[0,7])
xlabel('Proportion of total number of cards, week 1')
ylabel('Proportion of total number of cards, week 2')
title('Frequency of cards per function')
for label,x,y in map(None,labels,datax,datay):
annotate(function,xy=(x,y),size=8)
Thanks!
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[Matplotlib-users] problem with agg
Greetings... I am working using the matplotlib version 0.90.1, and i am having some strange problems with my application. When i execute in some pcs, there is no problem at all, but in others pcs, i receive this message: File pylab.pyc, line 1 in ? File matplotlib\pylab.pyc, line 203 in ? File matplotlib\axes.pyc, line 14 in ? File matplotlib\agg.pyc, line 5 in ? File matplotlib\_agg.pyc, line 12 in ? File matplotlib\_agg.pyc, line 10 in ? ImportError: Dll Load Failed All the pc's have Windows Xp, most of them Pentium 4, some are Pentium D. I don't know what may be the issue. All those pcs have the same software, just different hardware, i hope you could help me with this little problem. Thanks in advance... - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Plotting in C++
Hi all, Christopher Barker wrote: The only difference that my users see between an app written in Python and C++ is that the Python one has more features...and fewer bugs. I'm currently working mostly in C++ and exploring integration with Python through Boost.Python+IPython+MPL. I enjoy working in Python, but I'm afraid of making a more consistent switch mainly for fear of losing the static type checking that C++ gives me. I have the horrifying feeling that if I were to write much code in Python I could break it in so many ways just because of this, and I'd have the constant perception of not having my back covered by the compiler, at least for this kind of errors. It's true that probably I'd get the software up and running in less time with Python, but I think that I would spend much more time making sure it behaves as expected and fortifying it, so to speak. Am I totally offset here? Francesco. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] I really need help about installing matplotlib.
Please Help me. I am a beginner in programming. Due to my research, I should know how to make graph using python and matplotlib. I went to matplotlib website and downloaded and installed enthought python Enthought python is a package that include numpy, wxPython GUI toolkit and SciPy. I installed Enthought python at C:/Python24 and downloaded and installed matplotlib C:/ I did know which things I downloaded.. But I downloaded.. matplotlib-0.91.2.win32-py2.4.exe matplotlib-0.91.2-py2.4-win32.egg matplotlib-0.91.2.tar.gz Did I downloaded right things? Anyway, I installed and opened Python(Idle) and tried to make a graph from pylab import * RuntimeError: module compiled against version 109 of C-API but this version of numpy is 90907 Traceback (most recent call last): File pyshell#2, line 1, in -toplevel- from pylab import * File C:\Python24\Lib\site-packages\pylab.py, line 1, in -toplevel- from matplotlib.pylab import * File C:\Python24\Lib\site-packages\matplotlib\pylab.py, line 208, in -toplevel- from matplotlib import mpl # pulls in most modules File C:\Python24\Lib\site-packages\matplotlib\mpl.py, line 1, in -toplevel- from matplotlib import artist File C:\Python24\Lib\site-packages\matplotlib\artist.py, line 4, in -toplevel- from transforms import identity_transform File C:\Python24\Lib\site-packages\matplotlib\transforms.py, line 254, in -toplevel- from matplotlib._transforms import Value, Point, Interval, Bbox, Affine ImportError: numpy.core.multiarray failed to import What is the problem? Do I need to update numpy? Please help me, I am so desperate.. -- View this message in context: http://www.nabble.com/I-really-need-help-about-installing-matplotlib.-tp15773095p15773095.html Sent from the matplotlib - users mailing list archive at Nabble.com. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] PNG filesize
Hi all, I'm trying to find ways to make the file-size of my PNG images smaller. When I generate my 660*440px image I get a big 168kb file. (8bit RGB color model, has an alpha channel (need that) but no interlacing scheme) Here it is: http://metphys.org/eme/T05.png I'm using the savefig method of-course. To see how much I could compress it I used pngcrush (the best tool according to the interwebs) and got it down to 128kb. But thats still way to large for my intended use. (plotting results from an operational weather model, see. www.belgingur.is We are currently using IDL.) From what I've read about PNG files, which is supposed to be rather compact image format, it seems to me that the most effective way is to have an indexed color table. So to cut it short: Is there any way to save a PNG file with an indexed color table? Or do you see any other way to shrink the files? Best regards. Einar M. Einarsson www.belgingur.is - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] issues with yahoo historical data candlestick drawing in finance.py
Hi all, I apologize in advance if these issues have already been addressed. I did a search of the mailing lists and did not find them discussed but I may have missed them. I had some trouble getting the historical quotes data from yahoo to work, apparently because yahoo changed the format of the dates in their output files - once I changed the date format string in finance.py it worked fine. Also the color of the candlestick shadow line that shows the day's range was hard-coded to be black. Because it didn't show up on my charts with black backgrounds, I changed the code to make the shadow match the color of the candle's real body. I am attaching a diff of my finance.py, which on my Debian Etch system came in a package that says its version is 0.87.7-0.3. Please keep in mind that I do not intend the code I am attaching to be a comprehensive fix, just a simple kludge. I am totally new both to matplotlib and to python and I have only done as much kludge-ing as was necessary to get the code to do what I needed it to do right now. I will leave doing things the right way, to people already more familiar with the language and the code. Peace, Michael Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ 53c53 dt = datetime.date(*time.strptime(datestr, '%d-%b-%y')[:3]) --- dt = datetime.date(*time.strptime(datestr, '%Y-%m-%d')[:3]) 268c268 color='k', --- color=color, - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Compiler error on OS X 10.5.2 in agg
Hi All,
Zachary Pincus wrote:
Can you tell me where you specified the -Os option to gcc to escape
the problem?
So the compile that command that failed is printed right above the
error message it generated. (The long line that starts with
'gcc' ...). I just copied this command, edited the -O3 to an -Os, and
pasted that command-line back into the terminal. Total low-tech hack,
as I didn't want to much with the setup.py file to fix compile flags
on a per-file basis.
After that file is compiled manually, you can re-run 'python setup.py
build', and it will start up at the next step after the error.
I got the same error in another step, which was a bit trickier to fix,
because for some reason, src/_image.cpp gets copied to src/image.cpp
on a temporary basis, and then compiled. (I presume the file isn't
also modified?) But after the compile errors out, the copy is deleted,
so just pasting in the offending gcc command doesn't work. So I had to
manually copy src/_image.cpp to scr/image.cpp, and then paste in the
modified gcc command.
Ugh! I'd really love some help reducing this to a test case that I can
send to Apple.
I've got the same error(s) in the same situation (10.5.2). I haven't
seen it any other context nor have had any success in reducing to a test
case, alas. Could this have to do with picking up libraries (from fink
or elsewhere) and/or different compiler versions? I've got XCode 3 and
gcc 4.0. (I've actually got the apple 4.2 preview release as well but
that craps out even earlier, I assume due to library version mismatches...)
Andrew
Zach
On Mar 13, 2008, at 12:16 PM, Stephane Raynaud wrote:
Hi,
I got the same problem.
Can you tell me where you specified the -Os option to gcc to escape
the problem?
On Mon, Mar 10, 2008 at 4:35 AM, Zachary Pincus [EMAIL PROTECTED]
wrote:
Hello,
I just tried to compile the SVN head of matplotlib (r4994) from
source
on OS X 10.5.2 (with source builds of python 2.5.2 and the SVN head
of
numpy), and ran into an internal compiler error in the agg code.
(pkgconfig 0.23 and wxPython 2.8.7.1 also present and accounted for.)
Here's the compile line and error:
building 'matplotlib.backends._backend_agg' extension
gcc -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-
fused-
madd -fno-common -dynamic -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-
prototypes -I/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/site-packages/numpy/core/include -I/usr/X11/include/
libpng12 -I/usr/local/include -I/usr/include -I/usr/X11R6/include -
I. -I/Library/Frameworks/Python.framework/Versions/2.5/lib/
python2.5/
site-packages/numpy/core/include -Isrc -Iagg24/include -I. -I/usr/
X11/include/freetype2 -I/usr/X11/include -I/usr/local/include -I/
usr/
include -I/usr/X11R6/include -I. -I/Library/Frameworks/
Python.framework/Versions/2.5/include/python2.5 -c src/_image.cpp -o
build/temp.macosx-10.4-i386-2.5/src/_image.o
cc1plus: warning: command line option -Wstrict-prototypes is valid
for C/ObjC but not for C++
src/_image.cpp: In member function 'Py::Object
_image_module::from_images(const Py::Tuple)':
src/_image.cpp:842: error: insn does not satisfy its constraints:
(insn 2573 1070 2574 126 agg24/include/agg_color_rgba.h:268 (set
(mem:QI (plus:SI (reg/f:SI 6 bp)
(const_int -280 [0xfee8])) [0 SR.2969+0
S1 A8])
(reg:QI 5 di)) 56 {*movqi_1} (nil)
(nil))
src/_image.cpp:842: internal compiler error: in
reload_cse_simplify_operands, at postreload.c:391
Please submit a full bug report, with preprocessed source if
appropriate.
See URL:http://developer.apple.com/bugreporter for instructions.
This seems to be an agg and OS X error; it's cropped up here:
http://trac.osgeo.org/mapserver/ticket/2368
and John Hunter reported it on the agg list here:
http://article.gmane.org/gmane.comp.graphics.agg/3963
Unfortunately, the error appears to either not have been fixed by the
10.5.1 update, as suggested in the email thread cited above, or the
error re-appeared in 10.5.2.
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Re: [Matplotlib-users] PNG filesize
I'd guess PNG won't get much smaller because you have a lot of different colored pixels. PNG compresses most when you have a sparser plot. I'd suggest that you try using JPG. It will compress the multi-colored portion of your plot way down. You may see a few artifacts if you look carefully at the axes: instead of pixels white,black,white you might get white,grey,black,grey,white. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Einar M. Einarsson Sent: Monday, March 17, 2008 5:08 AM To: matplotlib-users@lists.sourceforge.net Subject: [Matplotlib-users] PNG filesize Hi all, I'm trying to find ways to make the file-size of my PNG images smaller. When I generate my 660*440px image I get a big 168kb file. (8bit RGB color model, has an alpha channel (need that) but no interlacing scheme) Here it is: http://metphys.org/eme/T05.png I'm using the savefig method of-course. To see how much I could compress it I used pngcrush (the best tool according to the interwebs) and got it down to 128kb. But thats still way to large for my intended use. (plotting results from an operational weather model, see. www.belgingur.is We are currently using IDL.) From what I've read about PNG files, which is supposed to be rather compact image format, it seems to me that the most effective way is to have an indexed color table. So to cut it short: Is there any way to save a PNG file with an indexed color table? Or do you see any other way to shrink the files? Best regards. Einar M. Einarsson www.belgingur.is --- -- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] BUG: Log axes are upside down with PDF output...
On Mar 21, 2008, at 6:12 AM, Michael Droettboom wrote: I vaguely recall a bug whereby mathtext on PDF was upside down (because the direction of the y-axis was not being inverted)... but I can't find the bug report. It does seem to work in 0.90.1 and 0.91.2 (on Linux at least). Are you able to upgrade? Hm. On my Linux box, Well, easy_install should upgrade me to 91.2, but won't build because ft2build.h is missing...? Apparently that's part of freetype v2, which I have installed... On my Mac, easy_install says that matplotlib 0.87.7 is the active version and the best version. I guess I can't easy install... 02:46 PM t:/home/simsong# easy_install matplotlib Searching for matplotlib Reading http://pypi.python.org/simple/matplotlib/ Reading http://matplotlib.sourceforge.net Reading http://sourceforge.net/project/showfiles.php?group_id=80706package_id=82474 Reading http://sourceforge.net/project/showfiles.php?group_id=80706 Best match: matplotlib 0.91.2 Downloading http://downloads.sourceforge.net/matplotlib/matplotlib-0.91.2.tar.gz?modtime=1199627250big_mirror=0 Processing matplotlib-0.91.2.tar.gz Running matplotlib-0.91.2/setup.py -q bdist_egg --dist-dir /tmp/ easy_install-YMu8YK/matplotlib-0.91.2/egg-dist-tmp-AOR3hR = = = = BUILDING MATPLOTLIB matplotlib: 0.91.2 python: 2.4.4 (#1, Oct 23 2006, 13:58:18) [GCC 4.1.1 20061011 (Red Hat 4.1.1-30)] platform: linux2 REQUIRED DEPENDENCIES numpy: 1.0.3 freetype2: found, but unknown version (no pkg-config) * WARNING: Could not find 'freetype2' headers in any * of '/usr/local/include', '/usr/include', '.', * '/usr/local/include/freetype2', * '/usr/include/freetype2', './freetype2'. OPTIONAL BACKEND DEPENDENCIES libpng: found, but unknown version (no pkg-config) * Could not find 'libpng' headers in any of * '/usr/local/include', '/usr/include', '.' Tkinter: no * Tkinter present, but header files are not found. * You may need to install development packages. wxPython: no * WXAgg's accelerator requires `wx-config'. The * `wx-config' executable could not be located in any * directory of the PATH environment variable. If you * want to build WXAgg, and wx-config is in some * other location or has some other name, set the * WX_CONFIG environment variable to the full path of * the executable like so: export WX_CONFIG=/ usr/lib * /wxPython-2.6.1.0-gtk2-unicode/bin/wx-config Gtk+: no * pygtk present but import failed Qt: Qt: 3.3.7, PyQt: 3.17 Qt4: no Cairo: 1.2.6 OPTIONAL DATE/TIMEZONE DEPENDENCIES datetime: present, version unknown dateutil: present, version unknown pytz: 2006p OPTIONAL USETEX DEPENDENCIES dvipng: 1.5 ghostscript: 8.15.4 latex: 3.141592 pdftops: 3.00 EXPERIMENTAL CONFIG PACKAGE DEPENDENCIES configobj: matplotlib will provide enthought.traits: matplotlib will provide [Edit setup.cfg to suppress the above messages] = = = = warning: no files found matching 'NUMARRAY_ISSUES' warning: no files found matching 'MANIFEST' warning: no files found matching 'matplotlibrc' warning: no files found matching 'lib/matplotlib/toolkits' no previously-included directories found matching 'examples/_tmp_*' In file included from src/ft2font.cpp:2: src/ft2font.h:11:22: error: ft2build.h: No such file or directory src/ft2font.h:12:10: error: #include expects FILENAME or FILENAME src/ft2font.h:13:10: error: #include expects FILENAME or FILENAME src/ft2font.h:14:10: error: #include expects FILENAME or FILENAME src/ft2font.h:15:10: error: #include expects FILENAME or FILENAME src/ft2font.h:16:10: error: #include expects FILENAME or FILENAME src/ft2font.h:31: error: ‘FT_Bitmap’ has not been declared src/ft2font.h:31: error: ‘FT_Int’ has not been declared src/ft2font.h:31: error: ‘FT_Int’ has not been declared src/ft2font.h:75: error: expected ‘,’ or ‘...’ before ‘’ token src/ft2font.h:75: error: ISO C++ forbids declaration of ‘FT_Face’ with no type src/ft2font.h:81: error: expected ‘,’ or ‘...’ before ‘’ token src/ft2font.h:81: error: ISO C++ forbids declaration of ‘FT_Face’ with no type src/ft2font.h:121:
[Matplotlib-users] Color schemes for XY plots?
All, A quick question So i've experimented with pcolor, and it's not really what I'm looking for. What I'm attempting to do is plot some XY coordinates, just a simple function, with the line being colored differently depending on the value of that function. So if perhaps you were plotting temperature vs time, you'd see the line change to red when it approached higher temperatures and blue when it approached lower temperatures. Any advice as to how to do this? Regards, Ken - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] How do I change the font size for the default coordinates?
On Thu, Mar 20, 2008 at 7:32 PM, carlwenrich [EMAIL PROTECTED] wrote: I've searched the user manual (and this forum) but I don't see anything that helps. Assuming you mean what we call the tick labels: import matplotlib matplotlib.rcParams['xtick.labelsize'] = 14 matplotlib.rcParams['ytick.labelsize'] = 14 These can also be changed in your matplotlibrc file -- see http://matplotlib.sf.net/matplotlibrc JDH - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] 'from matplotlib.cbook import is_scalar, dedent' ImportError: cannot import name dedent
On Sat, Feb 23, 2008 at 3:25 AM, pmarsh [EMAIL PROTECTED] wrote: Hello List, I am using python-matplotlib version 0.87.7-0.3ubuntu1(feisty) and having some problems with a script that uses it. I get this import error and am not sure how to debug it further, any assistance would be greatly appreciated. It looks like the basemap version you are using is assuming a more recent version of matplotlib. You will probably either need to upgrade to more recent matplotlib (0.91.2 is the most recent) or downgrade to an older basemap. JDH - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Color schemes for XY plots?
On Fri, Mar 21, 2008 at 2:34 PM, Kenneth Miller [EMAIL PROTECTED] wrote: So i've experimented with pcolor, and it's not really what I'm looking for. What I'm attempting to do is plot some XY coordinates, just a simple function, with the line being colored differently depending on the value of that function. So if perhaps you were plotting temperature vs time, you'd see the line change to red when it approached higher temperatures and blue when it approached lower temperatures. The multi-colored line recipe should be enough to get you started: http://www.scipy.org/Cookbook/Matplotlib/MulticoloredLine JDH - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Vary point color with scatter
On Tue, Feb 26, 2008 at 3:23 AM, Michaël Douchin [EMAIL PROTECTED] wrote: What is the good way to do what I reach for ? I have much trouble to know how to define the c parameter of scatter. I saw the arrange thing somewhere in internet, but don't understand what it is for. Have you tried the scatter demos? See for example http://matplotlib.sf.net/examples/scatter_demo2.py JDH - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] compiling from svn on windows
On Fri, Mar 21, 2008 at 2:00 AM, Eric Firing [EMAIL PROTECTED] wrote: Charlie Moad does the Windows releases. I don't know what compiler he uses. It would be nice if some people who have successfully built on Windows could collectively assemble a step-by-step account of how to go from a bare Win box to a working mpl (preferably compiled with mingw); but maybe this would take more effort than it is worth. I am on shaky ground suggesting it, because it is not something I can help with at all, and I don't even have a clear picture of what it would require. I gather a similar account would be useful for OS X. I made fairly detailed notes when I build numpy, scipy and mpl on a pristine powerbook: http://ipython.scipy.org/moin/Py4Science/InstallationOSX Unfortunately, I am having the same compiler error that Zachary and others are discussing in another thread (on the trunk but not the branch) JDH - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Plotting in C++
On Sat, 01 Mar 2008, Francesco Biscani apparently wrote: I'm currently working mostly in C++ and exploring integration with Python through Boost.Python+IPython+MPL. I enjoy working in Python, but I'm afraid of making a more consistent switch mainly for fear of losing the static type checking that C++ gives me. I have the horrifying feeling that if I were to write much code in Python I could break it in so many ways just because of this, and I'd have the constant perception of not having my back covered by the compiler, at least for this kind of errors. I suspect there is no answer to this fear except trying it. If you want to hear your fear ridiculed, you can post this query on comp.lang.python. If you want to hear your fear lauded for its sensibility, post it to comp.lang.c++. That said, note that Python supports properties (getters and setters) that can do runtime checking. Also Python 3 supports function annotations, which someone will certainly exploit to provide type checking. I guess you might find PEP 3119 (ABCs) relevant as well. Cheers, Alan Isaac - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] update: BUG - axes problem update
1. Moving to matplotlib-0.91.2 solved the problem with PDF generation on log axes. 2. Installing matplotlib-0.91.2 on Linux required installing these packages first: * freetype-devel * libpng-devel (Those packages were NOT installed automatically by easy_install) - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] question #2 - labeled bar graphs
Is there an easy way to label bars with the value of the bar at that point? I am doing log bars and it would be nice to have them labeled. I guess I can do this manually using text() and the values returned by bar(); is there an automatic way to do it? Thanks! - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] PNG filesize
Einar M. Einarsson wrote: Hi all, I'm trying to find ways to make the file-size of my PNG images smaller. When I generate my 660*440px image I get a big 168kb file. (8bit RGB color model, has an alpha channel (need that) but no interlacing scheme) Here it is: http://metphys.org/eme/T05.png I'm using the savefig method of-course. To see how much I could compress it I used pngcrush (the best tool according to the interwebs) and got it down to 128kb. But thats still way to large for my intended use. (plotting results from an operational weather model, see. www.belgingur.is We are currently using IDL.) From what I've read about PNG files, which is supposed to be rather compact image format, it seems to me that the most effective way is to have an indexed color table. So to cut it short: Is there any way to save a PNG file with an indexed color table? Perhaps this should be supported natively in mpl; but until it is, you can do the conversion after the fact using pngquant or pngnq. Presumably, if you don't in fact have more than 256 colors, this conversion will be lossless. I have not tried this; my suggestion is based on the descriptions of pngquant and pngnq packages in Ubuntu feisty. Here is the latter: tool for optimizing PNG (Portable Network Graphics) images Pngnq is a tool for quantizing 32-bit RGBA PNG images to 8-bit RGBA pallete PNG. It's is an adaptation by Stuart Coyle of Greg Roelf's pnqquant. While pngquant uses a median cut algorithm, Pngnq uses Anthony Dekker's neuquant algorithm (http://members.ozemail.com.au/~dekker/NEUQUANT.HTML), generally resulting in better looking results than pngquant. Optimizers (like pngcrush and optipng) optimize the compression, usually losslessly. pngnq quantizes colors down to 256 (or fewer) distinct RGBA combinations, which is quite lossy. Optimized PNGs are usually two to four times smaller than the 32-bit versions. Homepage: http://www.cybertherial.com/pngnq/pngnq.html --- Or do you see any other way to shrink the files? Best regards. Einar M. Einarsson www.belgingur.is - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Problem with matplotlib and pdflatex
I'm trying to use some matplotlib-generated pdfs in a pdflatex document,
and seeing some extremely weird and disruptive size effects. The
resulting pdfs can be seen at
http://research.janelia.org/coventry/paper.pdf
http://research.janelia.org/coventry/paper-small.pdf
The first results from the code
\begin{figure}
\centering
\subfigure[Prior distribution]{\label{fig:prior-graph}
\includegraphics[width=6in]{prior-example}
}
\subfigure[Posterior distribution]{\label{fig:posterior-graph}
\includegraphics[width=6in]{posterior-example}
}
\end{figure}
and the second from the same code with width=5cm. The two pdfs I'm
trying to include are at
http://research.janelia.org/coventry/prior-example.pdf and
http://research.janelia.org/coventry/posterior-example.pdf
It doesn't matter what order I include them in, I get the same size
effects. If I generate postscript files with matplotlib and convert
them to pdfs, I don't get this problem. So I have a workaround, but I
would like to know how to create usable pdfs directly, and thought
reporting this might be useful to matplotlib development.
Best,
Alex
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Re: [Matplotlib-users] question #2 - labeled bar graphs
On Fri, Mar 21, 2008 at 4:18 PM, Simson Garfinkel [EMAIL PROTECTED] wrote:
Is there an easy way to label bars with the value of the bar at that
point? I am doing log bars and it would be nice to have them labeled.
I guess I can do this manually using text() and the values returned by
bar(); is there an automatic way to do it?
There is nothing built in (though it would be a nice feature). Here
is a simple example:
import numpy as np
import matplotlib.pyplot as plt
N = 5
menMeans = (20, 35, 30, 35, 27)
menStd = (2, 3, 4, 1, 2)
ind = np.arange(N) # the x locations for the groups
width = 0.35 # the width of the bars
fig = plt.figure()
ax = fig.add_subplot(111)
rects1 = ax.bar(ind, menMeans, width, color='r', yerr=menStd)
womenMeans = (25, 32, 34, 20, 25)
womenStd = (3, 5, 2, 3, 3)
rects2 = ax.bar(ind+width, womenMeans, width, color='y', yerr=womenStd)
# add some
ax.set_ylabel('Scores')
ax.set_title('Scores by group and gender')
ax.set_xticks(ind+width, ('G1', 'G2', 'G3', 'G4', 'G5') )
ax.legend( (rects1[0], rects2[0]), ('Men', 'Women') )
def autolabel(rects):
# attach some text labels
for rect in rects:
height = rect.get_height()
ax.text(rect.get_x()+rect.get_width()/2., 1.05*height, '%d'%int(height),
ha='center', va='bottom')
autolabel(rects1)
autolabel(rects2)
#fig.savefig('barchart_demo')
plt.show()
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Re: [Matplotlib-users] matplotlib threadsafe?
On Fri, Mar 21, 2008 at 1:40 AM, Eric Firing [EMAIL PROTECTED] wrote: Out of interest, how does one tell MPL to start a new figure and forget everything that's gone before? You can minimize the amount of package and module-level state information by using the oo interface: see examples/agg_oo.py. If you change any rcParams dictionary entries, typically using the rc function, then you can restore the dictionary to its default condition with the rcdefaults() function. I think it is comparatively rare to modify rc params within code (and never necessary since you can achieve the same by setting properties directly using the API) so if the rc params are the only global information we are using (and I am not aware of other problems off the top of my head but you might be well served to post to the antigrain mailing list to see if agg is thread safe) it shouldn't pose a serious problem. JDH - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [newbie] live plots of multiple lines
Hey Matthias, Matthias Michler wrote: maybe something like the following helps you: - from pylab import * from time import sleep ion() # interactive mode 'on' figure() ax = subplot(111, autoscale_on=True) x, y = [0], [0] line = plot(x, y, label=my_data)[0] # get the line-object as the first element # of the tuple returned by plot legend() for i in arange(10): x.append(i) # append new values y.append(i**2) line.set_data(x,y)# reset data ax.relim()# reset axes limits ax.autoscale_view() # rescale axes draw()# redraw current figure sleep(0.5)# wait 0.5 seconds ioff() This is perfect, except for one little thing... My x-axis is time, and as new points are plotted, even though I'm following the above recipe pretty closely, the x-tick spacing isn't getting sorted out, so I end up with just a jumble as the tick labels for the x-axis. Do you know why this might be? I don't know how to make this somehow interactive concerning the data input. but maybe you save the data to a file and read them every 15 or 20 minutes. This isn't a problem, I just run in a while True loop and leave it running until I close the plot window. Shame I get that horrible exception when I do close the plot window, wish I knew how to make it stop :-S cheers, Chris -- Simplistix - Content Management, Zope Python Consulting - http://www.simplistix.co.uk - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Plotting in C++
Dear Francesco, I'm sorry --- it is hard not to read your message and laugh. You really think that the static type checking of C++ is protecting you? Well, it may be, but C++ is unsafe in so many other ways that you are not doing yourself a favor by working in it. If you want to use a typesafe language, you really should be using Java or Python. Java will give you both static and dynamic type checking. Python will give you runtime type checking. C++ gives you a good feeling until something goes wrong and it crashes. On Feb 29, 2008, at 5:29 PM, Francesco Biscani wrote: Hi all, Christopher Barker wrote: The only difference that my users see between an app written in Python and C++ is that the Python one has more features...and fewer bugs. I'm currently working mostly in C++ and exploring integration with Python through Boost.Python+IPython+MPL. I enjoy working in Python, but I'm afraid of making a more consistent switch mainly for fear of losing the static type checking that C++ gives me. I have the horrifying feeling that if I were to write much code in Python I could break it in so many ways just because of this, and I'd have the constant perception of not having my back covered by the compiler, at least for this kind of errors. It's true that probably I'd get the software up and running in less time with Python, but I think that I would spend much more time making sure it behaves as expected and fortifying it, so to speak. Am I totally offset here? Francesco. - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Install problem on Leopard
Yes it was the matplotlib-0.91.2-py2.5-macosx-10.3-fat.egg I tried to install. I've posted the entire easy_install output below. I'll let the list know if i resolve the problem. Andrew --- Processing matplotlib-0.91.2-py2.5-macosx-10.3-fat.egg creating /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib-0.91.2-py2.5-macosx-10.3-fat.egg Extracting matplotlib-0.91.2-py2.5-macosx-10.3-fat.egg to /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages Adding matplotlib 0.91.2 to easy-install.pth file Installed /Library/Frameworks/Python.framework/Versions/2.5/lib/python2.5/site-packages/matplotlib-0.91.2-py2.5-macosx-10.3-fat.egg Processing dependencies for matplotlib==0.91.2 Searching for matplotlib==0.91.2 Reading http://pypi.python.org/simple/matplotlib/ Reading http://matplotlib.sourceforge.net Reading http://sourceforge.net/project/showfiles.php?group_id=80706package_id=82474 Reading http://sourceforge.net/project/showfiles.php?group_id=80706 Best match: matplotlib 0.91.2 Downloading http://downloads.sourceforge.net/matplotlib/matplotlib-0.91.2.tar.gz?modtime=1199627250big_mirror=0 Processing matplotlib-0.91.2.tar.gz Running matplotlib-0.91.2/setup.py -q bdist_egg --dist-dir /tmp/easy_install-QGmbAu/matplotlib-0.91.2/egg-dist-tmp-hsIe8R BUILDING MATPLOTLIB matplotlib: 0.91.2 python: 2.5.2 (r252:60911, Feb 22 2008, 07:57:53) [GCC 4.0.1 (Apple Computer, Inc. build 5363)] platform: darwin REQUIRED DEPENDENCIES numpy: 1.0.5.dev4897 freetype2: 9.16.3 OPTIONAL BACKEND DEPENDENCIES libpng: 1.2.24 Tkinter: Tkinter: 50704, Tk: 8.4, Tcl: 8.4 wxPython: no * wxPython not found Gtk+: no * Building for Gtk+ requires pygtk; you must be able * to import gtk in your build/install environment Qt: no Qt4: no Cairo: no OPTIONAL DATE/TIMEZONE DEPENDENCIES datetime: present, version unknown dateutil: matplotlib will provide pytz: matplotlib will provide OPTIONAL USETEX DEPENDENCIES dvipng: no ghostscript: 8.57 latex: no EXPERIMENTAL CONFIG PACKAGE DEPENDENCIES configobj: matplotlib will provide enthought.traits: matplotlib will provide [Edit setup.cfg to suppress the above messages] warning: no files found matching 'NUMARRAY_ISSUES' warning: no files found matching 'MANIFEST' warning: no files found matching 'matplotlibrc' warning: no files found matching 'lib/matplotlib/toolkits' no previously-included directories found matching 'examples/_tmp_*' In file included from /Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/Python.h:8, from ./CXX/WrapPython.h:47, from ./CXX/Extensions.hxx:48, from src/ft2font.h:18, from src/ft2font.cpp:2: /Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/pyconfig.h:814:1: warning: SIZEOF_LONG redefined In file included from /usr/X11/include/freetype2/freetype/freetype.h:41, from src/ft2font.h:12, from src/ft2font.cpp:2: /usr/X11/include/freetype2/freetype/config/ftconfig.h:65:1: warning: this is the location of the previous definition In file included from /Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/Python.h:8, from ./CXX/WrapPython.h:47, from ./CXX/Extensions.hxx:48, from src/ft2font.h:18, from src/ft2font.cpp:2: /Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/pyconfig.h:814:1: warning: SIZEOF_LONG redefined In file included from /usr/X11/include/freetype2/freetype/freetype.h:41, from src/ft2font.h:12, from src/ft2font.cpp:2: /usr/X11/include/freetype2/freetype/config/ftconfig.h:65:1: warning: this is the location of the previous definition In file included from /usr/include/math.h:26, from /Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/pyport.h:231, from /Library/Frameworks/Python.framework/Versions/2.5/include/python2.5/Python.h:57, from ./CXX/WrapPython.h:47, from CXX/cxxextensions.c:38: /usr/include/architecture/ppc/math.h:675: warning: conflicting types for built-in function ‘scalb’ ld: in /sw/lib/libJPEG.dylib, file is not of required architecture for architecture ppc collect2: ld returned 1 exit status lipo: can't open input file: /var/tmp//ccG9WQI9.out (No such
