Re: [Matplotlib-users] Pylab breaks locales with GTK
It's a bug with PyGTK in that merely importing it sets the locale. But more seriously, it's also a bug in Numpy, in that its string formatting is dependent on locale (unlike standard floats in Python). See this Numpy bug: http://projects.scipy.org/scipy/numpy/ticket/902 * *and this mailing list thread: http://www.mail-archive.com/numpy-discuss...@scipy.org/msg14563.html Cheers, Mike Ryan May wrote: Lionel Roubeyrie wrote: Hi all, Trying to write to text files some plotted datas, we have a strange behavour on masked arrays after importing pylab, with the dot decimal separator replaced by a comma (but not all) : ## Python 2.5.2 (r252:60911, Oct 5 2008, 19:24:49) [GCC 4.3.2] on linux2 Type help, copyright, credits or license for more information. This has been reported before, and IIRC, it's a problem with PyGTK. Ryan -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Switching between different font settings
Johan Ekh ekh.jo...@gmail.com writes:
So far I've tried reading a file with settings specific to the current
document and using rcParams.update(params) to dynamically change the
settings.
This seems to me to be a good way of switching between settings.
This way I can get the right font for legends and labels, but
I have not figured out how to get correct fonts for the numbers
on the x- and y-axes. Matplotlib uses whatever is default in my LaTeX
installation (Computer Modern?). I use text.usetex: True.
The usetex support attempts to select a font from the same list used by
matplotlib otherwise. I'm not sure if it's properly documented anywhere,
but the machinery is in texmanager.py, and here's the relevant data
structure:
font_info = {'new century schoolbook': ('pnc',
r'\renewcommand{\rmdefault}{pnc}'),
'bookman': ('pbk', r'\renewcommand{\rmdefault}{pbk}'),
'times': ('ptm', r'\usepackage{mathptmx}'),
'palatino': ('ppl', r'\usepackage{mathpazo}'),
'zapf chancery': ('pzc', r'\usepackage{chancery}'),
'cursive': ('pzc', r'\usepackage{chancery}'),
'charter': ('pch', r'\usepackage{charter}'),
'serif': ('cmr', ''),
'sans-serif': ('cmss', ''),
'helvetica': ('phv', r'\usepackage{helvet}'),
'avant garde': ('pag', r'\usepackage{avant}'),
'courier': ('pcr', r'\usepackage{courier}'),
'monospace': ('cmtt', ''),
'computer modern roman': ('cmr', ''),
'computer modern sans serif': ('cmss', ''),
'computer modern typewriter': ('cmtt', '')}
What font are you trying to use? Is it one of those listed above?
Since you say that you get the right font for legends and labels but not
for tick labels, perhaps the problem is with math mode. What font do you
get if you typeset a formula? Try something like
text(r'$1+2+3={}$1+2+3')
to see if the math font is different from the text font.
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Re: [Matplotlib-users] print_figure with animated objects
On Mon, Jan 5, 2009 at 9:30 AM, zndlf-...@yahoo.es wrote: but doing so does not save the lines. The only workaround I've found is to set animated=false for all the objects, print the figure and then set animated=true again. Yes, that is the way to do it -- we could add some logic to savefig to do this. JDH -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problems returning to main program after ploting a figure
It looks like you are trying to use pyplot is an embedded GUI and you might be better off trying to embed mpl in the GUI following the examples at... You were right about that. Thanks for the refererences. it helped a lot. The code is a bit longer now and contains parts from the examples that are hard for me to fully understand, but it works!! Florian -- View this message in context: http://www.nabble.com/problems-returning-to-main-program-after-ploting-a-figure-tp21292503p21294467.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] getting text size _before_ plotting
Michael Hearne wrote: All: I'm trying to make a map (using Basemap), and plot names of cities on that map. I'd like to avoid collisions of city names (where the bounding boxes of the text objects would overlap), but I'm having trouble figuring out how I can do this without actually drawing the text on the figure. I found this thread: http://osdir.com/ml/python.matplotlib.general/2005-02/msg00174.html which describes how to do it _after_ drawing the text on the plot. This would only be useful to me if there were some way to un-draw the text, which isn't something I know how to do either. Michael: Each Text instance that you add to the plot has a remove method that you can call to 'undraw' it. -Jeff Figure resizing is not a problem for my application. Java has a FontMetrics class, which tells you how big a string will be in a given font - is there an equivalent for Matplotlib? --Mike -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX: (303)497-6449 NOAA/OAR/PSD R/PSD1Email : jeffrey.s.whita...@noaa.gov 325 BroadwayOffice : Skaggs Research Cntr 1D-113 Boulder, CO, USA 80303-3328 Web: http://tinyurl.com/5telg -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Colormap range and data values
Hi all, I have an issue with the colormap for my plots. The data I'm plotting ranges between 0 and 24 but I am trying to have the colormap display values from 0 to 30. What happens is that the colormap reads the min and max values in my data and uses those disregarding the vmin and vmax set. Here is a snippet of code to show how I'm using the colormap: cmap= mpl.cm.jet norm= mpl.colors.Normalize(vmin=0,vmax=30) .. m.contourf(X,Y, zi, cmap = cmap, norm = norm) Another question is how can you setup the levels displyed in the colormap. In my previous example they are st at 0,3,6,9,12,...24. How can I make them every 2 values or every 1 value? Thanks, Anton -- View this message in context: http://www.nabble.com/Colormap-range-and-data-values-tp2129p2129.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] problems returning to main program after ploting a figure
Hi,
I am using matplotlib to create a figure in a pythonCard script that looks
like this
def on_button_mouseClick(self, event):
import matplotlib.pyplot as plt
plt.figure(1)
for point in list:
plt.plot([x],[y],'bo')
plt.title('Water balance %10s' % Gew_Name[0])
plt.xlabel('Station in km')
plt.ylabel('Flux in L/s')
plt.show()
plt.clf()
My problem is that the program will not continue after that. I tried to look
for commands to delete the figure but clf() was all I found. I am working
with windows xp and the idle shell. To close idle is the only thing that
helps. I intended to produce some more figures after the script has
calculated balances for a stream network. As you might have noticed, I am
not a python expert so please excuse my humpy description of the problem.
Thanks,
Florian
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Re: [Matplotlib-users] [matplotlib-devel] What would you like to see in a book about Matplotlib?
Hi Sandro, It's great news that a book may come out on MPL. Speaking as an aspiring university professor in neuroscience, I would like to see something that could be used as a resource for undergraduate students just learning Python and MPL. Due to this perspective, I think such a book would cover both numpy and MPL. The emphasis could clearly by on MPL, but basic numpy idioms and concepts should also be taught. I think an example-driven approach would be very useful -- something like an undergraduate laboratory experiment where students measure and plot raw values and compute histograms and statistics (e.g. mean and std). More advanced sections might perform statistical comparisons of different treatments (e.g. using chi squared, KS and/or T tests), do linear least squares fitting (with np.linalg.lstsq), and possibly non-linear curve fitting using something like scipy.optimize.fmin. That's my self-serving $0.02, since you asked! :) You may also want to speak with John Hunter and Fernando Perez about the possibility of collaborating -- they've already done some work towards a book, too. Andrew Sandro Tosi wrote: Hello and Happy 2009! I received the interesting proposal to author a book on Matplotlib, the powerful 2D plotting library for Python. While preparing the arguments list, I'd like to hear even your opinion, because different points-of-view will lead to a better product. Some basic question I'd like to ask are: - what are you using matplotlib for? - what are the things you like the most of matplotlib, that you want to give emphasis to? And why? - what are the (basic) things that, when you were beginning to use matplotlib, you wanted to see grouped up but couldn't find? - what would you like to see in a book about matplotlib? - what are some those advanced feature that made you yell WOW!! ? - what are the things you'd like to explore of matplotlib and never had time to do? Your suggestions are really appreciated :) And wish me good luck! Cheers, -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] Pylab breaks locales with GTK
Hi all,
Trying to write to text files some plotted datas, we have a strange
behavour on masked arrays after importing pylab, with the dot decimal
separator replaced by a comma (but not all) :
##
Python 2.5.2 (r252:60911, Oct 5 2008, 19:24:49)
[GCC 4.3.2] on linux2
Type help, copyright, credits or license for more information.
import numpy as np
a=np.ma.array([1., 1.01, 2.11, 3.61])
for i in a:str(i)
...
'1.0'
'1.01'
'2.11'
'3.61'
import matplotlib
for i in a:str(i)
...
'1.0'
'1.01'
'2.11'
'3.61'
import pylab
for i in a:str(i)
...
'1.0'
'1,01'
'2,11'
'3,61'
np.__version__, matplotlib.__version__
('1.2.1', '0.98.3')
#
Any help welcomes!
--
Lionel Roubeyrie
chargé d'études
LIMAIR - La Surveillance de l'Air en Limousin
http://www.limair.asso.fr
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[Matplotlib-users] print_figure with animated objects
Hello: I would like to know how to print_figure or savefig with animated elements. The only thing I get is the axis but no animated objects. The idea is that I've written a program embedding matplotlib in wx and then I create plots and animations in a similar way as in the example animation_blit_wx.py. In that way, I do something like: lines, = self.axes.plot(x,y,animated=True) background = self.canvas.copy_from_bbox(self.figure.bbox) and afterwards, I create some animation by updating the ydata in the following way: self.canvas.restore_region(background) lines.set_ydata(value) self.axes.draw_artist(lines) self.canvas.blit(self.figure.bbox) and now I would like to save the picture: self.canvas.print_figure(filename, format) but doing so does not save the lines. The only workaround I've found is to set animated=false for all the objects, print the figure and then set animated=true again. Thanks, Thomas -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] What would you like to see in a book about Matplotlib?
In article 8b2d7b4d0901050152p4c7487a8m21fb7fb823297...@mail.gmail.com, Sandro Tosi mo...@debian.org wrote: Hello and Happy 2009! I received the interesting proposal to author a book on Matplotlib, the powerful 2D plotting library for Python. While preparing the arguments list, I'd like to hear even your opinion, because different points-of-view will lead to a better product. Some basic question I'd like to ask are: - what are you using matplotlib for? Plotting data from a networked Tkinter application. - what are the (basic) things that, when you were beginning to use matplotlib, you wanted to see grouped up but couldn't find? - what would you like to see in a book about matplotlib? I want a user's guide for the class API. So far I've figured it out by reading examples, trying to extrapolate from the pylab user's guide (which is quite good) and reading the class API reference, but I feel that I barely understand what I am doing. - what are the things you'd like to explore of matplotlib and never had time to do? I'd like to know how best to handle plotting data as it arrives (e.g. strip charts and evolving x-y plots). I've got code that works but am not convinced I'm doing it in the best fashion. Histograms. -- Russell -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] typecode() in mlab.cohere_pairs
Hi, I'm stumbling (=getting an error) over the fact that cohere_pairs in the mlab module makes use of an unknown typecode() function. I'm guessing that typecode(X) comes from the pre-numpy era, and maybe it should be X.dtype or X.dtype.char or whatever. Is this a known bug, is it a bug at all, or what's happening? oh, I'm using a standard package setup on current Ubuntu 8.10, so in particular this should mean mpl version 0.98.3 and numpy 1.1.1. But I have checked the bleeding edge mlab in svn and at least the typecode(X) thing appears to be still there. thanks, sven (it would be very nice if you cc me in this thread, but of course I understand if the list's settings might make it impractical) -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] How to get Text dimensions
On Monday 22 December 2008 14:24:06 Franta wrote: Hi, when I have a Text instance, how can I get the dimensions of it? Hello, I think with dimensions you mean the width height and/or the corresponding corners of the box surrounding the text (its bounding box). I attached an example, which illustrates my solution. I hope it is useful to you. regards Matthias get_text_limits.py Description: application/python -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] getting text size _before_ plotting
All: I'm trying to make a map (using Basemap), and plot names of cities on that map. I'd like to avoid collisions of city names (where the bounding boxes of the text objects would overlap), but I'm having trouble figuring out how I can do this without actually drawing the text on the figure. I found this thread: http://osdir.com/ml/python.matplotlib.general/2005-02/msg00174.html which describes how to do it _after_ drawing the text on the plot. This would only be useful to me if there were some way to un-draw the text, which isn't something I know how to do either. Figure resizing is not a problem for my application. Java has a FontMetrics class, which tells you how big a string will be in a given font - is there an equivalent for Matplotlib? --Mike -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Pylab breaks locales with GTK
Thanks for your responses,
Looking comments in the tickets, putting
import locale
locale.setlocale(locale.LC_NUMERIC, 'C')
after the pylab import resolves the problem (but not the bug...).
Have a happy new year
Le lundi 05 janvier 2009 à 15:37 +0100, Lionel Roubeyrie a écrit :
Hi all,
Trying to write to text files some plotted datas, we have a strange
behavour on masked arrays after importing pylab, with the dot decimal
separator replaced by a comma (but not all) :
##
Python 2.5.2 (r252:60911, Oct 5 2008, 19:24:49)
[GCC 4.3.2] on linux2
Type help, copyright, credits or license for more information.
import numpy as np
a=np.ma.array([1., 1.01, 2.11, 3.61])
for i in a:str(i)
...
'1.0'
'1.01'
'2.11'
'3.61'
import matplotlib
for i in a:str(i)
...
'1.0'
'1.01'
'2.11'
'3.61'
import pylab
for i in a:str(i)
...
'1.0'
'1,01'
'2,11'
'3,61'
np.__version__, matplotlib.__version__
('1.2.1', '0.98.3')
#
Any help welcomes!
--
Lionel Roubeyrie
chargé d'études
LIMAIR - La Surveillance de l'Air en Limousin
http://www.limair.asso.fr
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[Matplotlib-users] ploting a logarithmic regression to scattered data ?
Hi, I can't find a way to do a logarithmic regression in matplotlib, This can be done relatively easily in spread sheets like gnumeric and excel. Has anyone got a clue how to do it ? Thanks, Oz. -- Imagine there's no countries It isn't hard to do Nothing to kill or die for And no religion too Imagine all the people Living life in peace --- when one person suffers from a delusion it is called insanity. When many people suffer from a delusion it is called religion. Robert Pirsig, Zen and the Art of Motorcycle Maintenance -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Pylab breaks locales with GTK
Hi Ryan, Ryan May wrote: Lionel Roubeyrie wrote: Hi all, Trying to write to text files some plotted datas, we have a strange behavour on masked arrays after importing pylab, with the dot decimal separator replaced by a comma (but not all) : ## Python 2.5.2 (r252:60911, Oct 5 2008, 19:24:49) [GCC 4.3.2] on linux2 Type help, copyright, credits or license for more information. This has been reported before, and IIRC, it's a problem with PyGTK. The fact that pygtk changes the local at import sounds buggy indeed, but numpy should not be dependent on the locale anyway, so it also shows a numpy bug I think: http://scipy.org/scipy/numpy/ticket/884 Pauli and other have been working on those locale-related bugs in numpy, but they are a bit fastidious to fix - hopefully, they will make their way into numpy 1.3 David -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Pylab breaks locales with GTK
Lionel Roubeyrie wrote: Hi all, Trying to write to text files some plotted datas, we have a strange behavour on masked arrays after importing pylab, with the dot decimal separator replaced by a comma (but not all) : ## Python 2.5.2 (r252:60911, Oct 5 2008, 19:24:49) [GCC 4.3.2] on linux2 Type help, copyright, credits or license for more information. This has been reported before, and IIRC, it's a problem with PyGTK. Ryan -- Ryan May Graduate Research Assistant School of Meteorology University of Oklahoma -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Pylab breaks locales with GTK
This seems to be a bug (or at least inconsistent behavior) in numpy when
the locale is set (which happens when gtk is imported -- replace 'import
pylab' with 'import gtk' and you'll see the same behavior).
We actually use a workaround for this in other parts of matplotlib,
which is:
for i in a: str(float(i))
By forcing the conversion to a Python float first, you can get around
the localized number output.
I'll follow up with this on the numpy bug tracker or mailing list, since
this has been a long-standing niggle of mine as well.
Cheers,
Mike
Lionel Roubeyrie wrote:
Hi all,
Trying to write to text files some plotted datas, we have a strange
behavour on masked arrays after importing pylab, with the dot decimal
separator replaced by a comma (but not all) :
##
Python 2.5.2 (r252:60911, Oct 5 2008, 19:24:49)
[GCC 4.3.2] on linux2
Type help, copyright, credits or license for more information.
import numpy as np
a=np.ma.array([1., 1.01, 2.11, 3.61])
for i in a:str(i)
...
'1.0'
'1.01'
'2.11'
'3.61'
import matplotlib
for i in a:str(i)
...
'1.0'
'1.01'
'2.11'
'3.61'
import pylab
for i in a:str(i)
...
'1.0'
'1,01'
'2,11'
'3,61'
np.__version__, matplotlib.__version__
('1.2.1', '0.98.3')
#
Any help welcomes!
--
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA
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Re: [Matplotlib-users] What would you like to see in a book about Matplotlib?
Sandro Tosi wrote: Hello and Happy 2009! Hi, I received the interesting proposal to author a book on Matplotlib, the powerful 2D plotting library for Python. While preparing the arguments list, I'd like to hear even your opinion, because different points-of-view will lead to a better product. Some basic question I'd like to ask are: - what are you using matplotlib for? I'm using it for scientific visualization and to create graphics for publications. - what are the things you like the most of matplotlib, that you want to give emphasis to? And why? The best thing for me about matplotlib is its publication quality. The nice clean anti-aliased graphics really look good, and made it an obvious choice when I was looking for graphic packages. The fact that it's based on python is even better for me, because that's what I was already using for scripting. The simple pyplot interface is also a plus, you can started producing great looking graphics almost immediately. - what are the (basic) things that, when you were beginning to use matplotlib, you wanted to see grouped up but couldn't find? I don't know if you consider it basic or not, but I would have liked better documentation of the object oriented interface (matplotlib). The pylab / pyplot interface is in general simple enough. As I started using this project some time ago its documentation wasn't as complete as it is now. - what would you like to see in a book about matplotlib? As above, at least a chapter about the object oriented interface showing how to embed matplotlib on a application, and outlining the structure of the OO interface. - what are some those advanced feature that made you yell WOW!! ? I haven't really used matplotlib's advanced features. There are some that I like, such as automatic legend placement and mathtext support. The number of supported backends is impressive just by itself, making matplotlib much more useful. There are some little things such as the search order for the matplotlibrc file that make it possible to specify different settings for a given directory. Although not a feature, another thing that impressed me was the quality of the source code, it's very clean an well structured. - what are the things you'd like to explore of matplotlib and never had time to do? I never had the time to try the masked arrays although I think they will be useful for me. I should also explore how to create custom color maps. Your suggestions are really appreciated :) And wish me good luck! I was going to! Good luck, I hope you manage to take this project to completion. João Silva -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Removing buttons from the toolbar in MPL backends
On Mon, Jan 5, 2009 at 1:56 PM, Mauro Cavalcanti mauro...@gmail.com wrote: Dear ALL, Is there any way to exclude (ie., make invlsible) one or more of the standard buttons which appear on the toolbar (either the Classic or the Toolbar2) of the MPL backends? Thanks in advance for any assistance you can provide! There are some examples using a custom toolbar which depends on which user interface you are using (there is no API for customizing from withing pylab/pyplot but it is on the wishlist to have a toolbar customization/extension API) See for example http://matplotlib.sourceforge.net/examples/user_interfaces/embedding_in_wx4.html?highlight=codex%20custom%20toolbar In this example a button is added to the default toolbar. You could copy the toolbar code out of the backend and remove the things you do not want and then add new buttons, etc. JDH -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] What would you like to see in a book about Matplotlib?
Hello João, thanks for replying On Mon, Jan 5, 2009 at 13:40, João Luís Silva jsi...@fc.up.pt wrote: Sandro Tosi wrote: - what are the (basic) things that, when you were beginning to use matplotlib, you wanted to see grouped up but couldn't find? I don't know if you consider it basic or not, but I would have liked better documentation of the object oriented interface (matplotlib). The could you be a little more specific on what you mean here? - what would you like to see in a book about matplotlib? As above, at least a chapter about the object oriented interface showing how to embed matplotlib on a application, and outlining the structure of the OO interface. Well, this is part of the purpose of the book: show how to embed mpl in applications. - what are some those advanced feature that made you yell WOW!! ? I haven't really used matplotlib's advanced features. There are some that I like, such as automatic legend placement and mathtext support. mathtext and latex support will be in the advanced features section The number of supported backends is impressive just by itself, making matplotlib much more useful. There are some little things such as the search order for the matplotlibrc file that make it possible to specify different settings for a given directory. There will be a part even on configuration (of course :) ). - what are the things you'd like to explore of matplotlib and never had time to do? I never had the time to try the masked arrays although I think they will be useful for me. I should also explore how to create custom color maps. 2 points added to the adv featues list (in part because something was already there, in a different form). Your suggestions are really appreciated :) And wish me good luck! I was going to! Good luck, I hope you manage to take this project to completion. Eheh, thanks! I really hope I'll be able to handle even this task :) Cheers, -- Sandro Tosi (aka morph, morpheus, matrixhasu) My website: http://matrixhasu.altervista.org/ Me at Debian: http://wiki.debian.org/SandroTosi -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [matplotlib-devel] What would you like to see in a book about Matplotlib?
Hello Andrew, thanks for taking the time to reply. First of all, let me clarify that I received a proposal (and not the opposite) so some decision were already made about the book format. On Mon, Jan 5, 2009 at 20:00, Andrew Straw straw...@astraw.com wrote: Hi Sandro, It's great news that a book may come out on MPL. Speaking as an aspiring university professor in neuroscience, I would like to see something that could be used as a resource for undergraduate students just learning Python and MPL. The cut of the book is for already experienced Python programmers. For sure, in the approaching chapter to mpl, I won't go too much into deep of python programming, and I suppose they'll be easy to read even for new comers. Due to this perspective, I think such a book would cover both numpy and MPL. The emphasis could clearly by on MPL, but basic numpy idioms and concepts should also be taught. Mh, the focus the editor would like to see is about introducing mpl + integrating into apps. The examples I have in mind for the pratical part of apps integration already cointains some sort of introduction to gather data and plot them (but I can't go to much on the scientific side :) ). I will propose a chapter like Matplotlib for the science and here your suggestion on what you'd like to see there is welcome. I think an example-driven approach would be very useful -- something like an undergraduate laboratory experiment where students measure and plot raw values and compute histograms and statistics (e.g. mean and std). More advanced sections might perform statistical comparisons of different treatments (e.g. using chi squared, KS and/or T tests), do linear least squares fitting (with np.linalg.lstsq), and possibly non-linear curve fitting using something like scipy.optimize.fmin. That could be a beginning of that chapter contents: more more more ideas :) That's my self-serving $0.02, since you asked! :) And they are very much welcome!! You may also want to speak with John Hunter and Fernando Perez about the possibility of collaborating -- they've already done some work towards a book, too. I'm sure be happy to hear their voice on this product, but (given the preamble) I don't know if the editor would be fine with co-authorship; I'll ask, just to be sure. Cheers, -- Sandro Tosi (aka morph, morpheus, matrixhasu) My website: http://matrixhasu.altervista.org/ Me at Debian: http://wiki.debian.org/SandroTosi -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [matplotlib-devel] What would you like to see in a book about Matplotlib?
Sandro Tosi wrote: The idea of the book is to start with simple plots, describing the methods we call and how they work, to go into more details along the book. I suggest that you focus on the OO interface, rather than the pylab interface from the beginning. This will ease the transition from command line use to embedding, help folks understand the structure of MPL, and is the right way to do it (IMHO) with an OO language anyway. -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 chris.bar...@noaa.gov -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [matplotlib-devel] What would you like to see in a book about Matplotlib?
On Tue, Jan 6, 2009 at 00:20, Christopher Barker chris.bar...@noaa.gov wrote: Sandro Tosi wrote: The idea of the book is to start with simple plots, describing the methods we call and how they work, to go into more details along the book. I suggest that you focus on the OO interface, rather than the pylab interface from the beginning. This will ease the transition from command line use to embedding, help folks understand the structure of MPL, and is the right way to do it (IMHO) with an OO language anyway. So you suggest to start from matplotlib.pyplot and not from pylab? Well, sure it's an interesting point-of-view. I'll reflect about your proposal. Thanks!! -- Sandro Tosi (aka morph, morpheus, matrixhasu) My website: http://matrixhasu.altervista.org/ Me at Debian: http://wiki.debian.org/SandroTosi -- ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [matplotlib-devel] What would you like to see in a book about Matplotlib?
Sandro Tosi wrote:
So you suggest to start from matplotlib.pyplot and not from pylab?
actually, I think matpoltlib.pyplot still has all of pylab in it, just
not all of numpy also. So yes, do that, but what I meant was to focus on
using the OO interface, rather than the state machine interface:
rather than 'gca', 'gcf', etc, store references to the figures and axis,
etc:
this kind of thing:
fig = plt.Figure()
ax = fig.add_subplot(111)
ax.plot([1,2,3])
ax.set_title('hi mom')
ax.grid(True)
ax.set_xlabel('time')
ax.set_ylabel('volts')
While we are at it, discourage the use of import * !
-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
chris.bar...@noaa.gov
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Re: [Matplotlib-users] [matplotlib-devel] What would you like to see in a book about Matplotlib?
On Tue, Jan 6, 2009 at 01:48, Christopher Barker chris.bar...@noaa.gov wrote:
Sandro Tosi wrote:
So you suggest to start from matplotlib.pyplot and not from pylab?
actually, I think matpoltlib.pyplot still has all of pylab in it, just not
all of numpy also.
yes, pylab glues pyplot and numpy together
So yes, do that, but what I meant was to focus on using
the OO interface, rather than the state machine interface:
rather than 'gca', 'gcf', etc, store references to the figures and axis,
etc:
this kind of thing:
fig = plt.Figure()
ax = fig.add_subplot(111)
ax.plot([1,2,3])
ax.set_title('hi mom')
ax.grid(True)
ax.set_xlabel('time')
ax.set_ylabel('volts')
Ahhh ok, now I got it: I always use the style above, so I didn't know
the difference :) A reference to the doc is:
http://matplotlib.sourceforge.net/faq/usage_faq.html
While we are at it, discourage the use of import * !
Absolutely!
Your suggestions were really precious: please don't stop the stream,
it anything comes up :)
Cheers,
--
Sandro Tosi (aka morph, morpheus, matrixhasu)
My website: http://matrixhasu.altervista.org/
Me at Debian: http://wiki.debian.org/SandroTosi
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