Re: [Matplotlib-users] swedish letters in yticks
2014-08-25 0:03 GMT+02:00 Johan Ekh ekh.jo...@gmail.com: Hi all I try to use yticks as plt.yticks(y_pos, projDescr) where projDescr is a list of strings that contains some swedish letters, i.e. åäö, but they are not printed correctly. I have googled but can not fins a solution. Can someone point me in the right direction? Best regards, Johan Hi, I am not sure, whether this is the same problem I encountered with Czech diacritics in matplotlib some time ago, but it definitively looks similar to me. You can check the respective thread and the mentioned workaround there: http://matplotlib.1069221.n5.nabble.com/font-setting-in-matplotlib-1-3-1-td42662.html Basically, it seems to be a problem with font selection with regard to Bitstream Vera; a workaround consist in manipulating rcParams and removing this item from the list of usable fonts. hth, vbr -- Slashdot TV. Video for Nerds. Stuff that matters. http://tv.slashdot.org/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] font setting in matplotlib 1.3.1
Many thanks for the fix as well as for the info! I didn't know, there are built in fonts like this in matplotlib; this would explain the issue - the character support of Bitstream Vera Sans is indeed rather limited; morover the special defaulting status of this font hopefully means, that this shouldn't happen with other fonts, hence, I won't need to account for other unknown fonts, as I was worried about initially. Thanks again and regards vbr 2014-01-27 Michael Droettboom md...@stsci.edu: Thanks for the report. Indeed, you are correct in that the root of this problem is that Bitstream Vera Sans does not contain these characters, yet it is being selected erroneously. It does appear that there is a bug in the font selection algorithm, that Bitstream Vera Sans gets selected as a perfect match even when it is not the first font in the requested list. Vera Sans ships with matplotlib and is the default fallback font, even though it is not installed as a system font on your computer. I have a fix here: https://github.com/matplotlib/matplotlib/pull/2771 In the meantime, the solution you arrived at is the probably the best we can do for now. Mike On 01/27/2014 11:21 AM, Phil Elson wrote: Thanks for this Vlastimil, looks like there is either a subtlety beyond my font knowledge or a bug here - mdboom, did you have any ideas? Otherwise I think we need a github issue for this. Cheers, On 4 January 2014 19:37, Vlastimil Brom vlastimil.b...@gmail.com wrote: Hi all, after upgrading to matplotlib 1.3.1, I noticed some display errors on the plots with regard to accented characters (such as carons etc.). As I recall, I had similar problem in the past and could work around them by modifying rcParams, however, this fix doesn't work as expected in 1.3.1. (with python 2.7.6, 32bit on Win 7, Czech - with both WXAgg and TKAgg backends). From the usual Czech diacritics áčďéěíňóřšťúůýž some are not displayed (ďěňřťů) - replacement squares are shown instead. Simply prepending a suitable font at the beginning of the list rcParams['font.sans-serif'] doesn't help in 1.3.1. I eventually found out, that Bitstream Vera Sans (which is not installed on this computer) is somehow offending - as long as this item is in the list (even at the end), the mentioned characters aren't displayed. The problem can be observed in the following simple pylab script: == #! Python # -*- coding: utf-8 -*- # with implicit fonts ďěňřťů are not displayed properly in the plot title from matplotlib import rcParams rcParams['font.family'] = 'sans-serif' if Bitstream Vera Sans in rcParams['font.sans-serif']: rcParams['font.sans-serif'].remove(Bitstream Vera Sans) # after appending the offending font even at the end of the list (by uncommenting the following line), ďěňřťů are not displayed again # rcParams['font.sans-serif'].append(Bitstream Vera Sans) import pylab pylab.title(uabcd áčďéěíňóřšťúůýž äöüß ê xyz) pylab.show() == Is there something special in the resolution of the font items in rcParams? This individual issue seems to be fixed with removing the single font, but I'd like to understand this more generally, as the installed fonts on different computers differ. Thanks in advance Vlastimil Brom -- Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831iu=/4140/ostg.clktrk ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431iu=/4140/ostg.clktrk ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- _ |\/|o _|_ _. _ | | \.__ __|__|_|_ _ _ ._ _ | ||(_| |(_|(/_| |_/|(_)(/_|_ |_|_)(_)(_)| | | http://www.droettboom.com -- CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments Everything In Between. Get a Quote
Re: [Matplotlib-users] Graphing in an existing PyGTK window
2013/8/19 Paul D. DeRocco pdero...@ix.netcom.com: I've just tried Matplotlib for the first time, for plotting on the screen, and the examples all seem to pop up a new window with interactive tools, like Matlab does. That's very nice, but what I need is to create a static plot that appears in some sort of widget in an existing window created with PyGTK, without any of the controls. Is there a page that shows how this can be done? Is it even possible? -- Ciao, Paul D. DeRocco Paulmailto:pdero...@ix.netcom.com Hi, to reuse the matplotlib controls or just the plotting area, check the examples on embedding in the demo pages: http://matplotlib.org/examples/user_interfaces/embedding_in_gtk.html or the others in the respective section: http://matplotlib.org/examples/user_interfaces/index.html (I don't use gtk myself, but I believe, it might be directly usable in your code.) hth, vbr -- Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with 2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031iu=/4140/ostg.clktrk ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] creating an object oriented matplotlib figure
2013/1/16 Kelson Zawack k...@cornell.edu: I want to create a matplotlib figure as part of a program I am writing and therefore would like to create the figure in a fully object oriented way, ie not in the pyplot state-full way. I understand how to work with a figure object to create axes objects and then fill the axes objects with primitive artists but I can't figure out what type of object to put the figure object in to get it displayed. From digging around in the source it looks like the show() method comes from the backend, but when I looked in 'matplotlib/backends/backend_agg' I saw no such object. What am I missing? I guess I could put the figure in a Qt window, but I like the functionality provided by the default matplotlib window. Thanks for the help Hi, if you need an embedded figure in some gui app (supported with matplotlib backends), you may check some demos on this topic: http://matplotlib.org/examples/user_interfaces/index.html embedding_in_ ... (gtk, tk, qt, wx) You can also reuse the gui elements such as toolbar etc. I have no experience with qt, but apparently, there is an example for this: http://matplotlib.org/examples/user_interfaces/embedding_in_qt4_wtoolbar.html Or is it some more specific problem, you are encountering? hth, vbr -- Master Java SE, Java EE, Eclipse, Spring, Hibernate, JavaScript, jQuery and much more. Keep your Java skills current with LearnJavaNow - 200+ hours of step-by-step video tutorials by Java experts. SALE $49.99 this month only -- learn more at: http://p.sf.net/sfu/learnmore_122612 ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Figures piling up in Tkinter GUI (1.2.0rc2)
2012/11/1 Hans Bering hans.ber...@arcor.de:
Hello everybody,
I'm building a small Tkinter GUI using matplotlib, in which I have to
change/update plots quite often depending on user input (with different
contents sizes, in different places in the GUI, etc.; but always only
one figure at a time).
As a first resort, I regenerated the figures with plt.figure(...) whenever
necessary; unfortunately, the program happily accumulated memory with
every new figure until the computer would no longer cooperate in a timely
fashion. The following minimal script should demonstrate the tendency:
...
Now I am wondering if I am missing some detail, e.g., some other clean-up
procedure? Or should this work could be a memory leak in matplotlib or
Tkinter? And/or is this approach (of generating a new figure every time)
not recommended in the first place? I tried reusing the figure, but some
aspects like changing the layout in the GUI and applying new size and dpi
then proved tricky in their own ways.
Many thanks in advance,
Hans
Hi,
I'd recommend to use an embedded plot and only clear and replace its
content (rather than tu use pyplot and recreate the figure multiple
times. I believe, changing of the figure should be possible too.
see e.g. the sample for tkinter
http://matplotlib.org/examples/user_interfaces/embedding_in_tk.html
I only roughly adapted that source to use your function and the memory
usage appears to be more effective (although there is some increase
too - as displayed in Process Explorer). Would some variation of the
following work for you?
hth,
vbr
#!/usr/bin/env python
import matplotlib
matplotlib.use('TkAgg')
import math
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg,
NavigationToolbar2TkAgg
from matplotlib.figure import Figure
import Tkinter
root = Tkinter.Tk()
root.wm_title(Embedding in TK)
fig = Figure(figsize=(5,4), dpi=100)
ax = fig.add_subplot(111)
canvas = FigureCanvasTkAgg(fig, master=root)
canvas.show()
canvas.get_tk_widget().pack(side=Tkinter.TOP, fill=Tkinter.BOTH, expand=1)
toolbar = NavigationToolbar2TkAgg( canvas, root )
toolbar.update()
canvas._tkcanvas.pack(side=Tkinter.TOP, fill=Tkinter.BOTH, expand=1)
plotShift = 0
def replot():
global plotShift, a, f
ax.clear()
xVals = xrange(100)
ax.plot(xVals, [math.sin(x + plotShift) for x in xVals])
fig.canvas.draw()
plotShift += 10
button = Tkinter.Button(master=root, text='replot', command=replot)
button.pack(side=Tkinter.BOTTOM)
Tkinter.mainloop()
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Re: [Matplotlib-users] reusing the pylab gui in a custom application (wxpython)?
2012/7/31 Benjamin Root ben.r...@ou.edu: On Sun, Jul 29, 2012 at 7:39 PM, Vlastimil Brom vlastimil.b...@gmail.com wrote: 2012/7/30 Benjamin Root ben.r...@ou.edu: On Sunday, July 29, 2012, Vlastimil Brom wrote: Hi all, I'd like to ask about the possibility to eventually reuse the gui of pylab for showing and manipulating the plots in the custom application (written in wxpython). [...] Thanks in advance for any hints regards Vlastimil Brom Absolutely! It is one of the things mpl does best. Do a search in the online documentation for embedding codex. I hope that helps! Ben Root Thanks for the quick response and a useful hint! I apparently didn't search for the right terms before... I turns out, that http://matplotlib.sourceforge.net/examples/user_interfaces/embedding_in_wx2.html shows exactly, what I need. By the way is there a place to propose a small correction of the example code? namely self.SetBackgroundColour(wx.NamedColor(WHITE)) causes an error in wxpython 2.9, which removed the ...Color aliases and only knows ...Colour hence: self.SetBackgroundColour(wx.NamedColour(WHITE)) works in wxpython 2.9 and should be backwards compatible too. Thanks again, vbr Thanks for catching that mistake. Unfortunately, we don't do a good enough job of keeping up to date on changes in various backends. The best way to make sure that gets fixed is to send us a pull request on github. At the very least, post an issue report on it. Ben Thanks, I created an issue: https://github.com/matplotlib/matplotlib/issues/1048 about this and also tried to send the pull requests about the four wx.NamedColor occurrences I could find. Unfortunately, I haven't any experiences with code management tools and github infrastructure, I didn't mess something up. Regards, vbr -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] reusing the pylab gui in a custom application (wxpython)?
Hi all, I'd like to ask about the possibility to eventually reuse the gui of pylab for showing and manipulating the plots in the custom application (written in wxpython). Basically, I'd like to add some application specific controls to the toolbar, or to place the existing gui to a custom frame, which would add such additional controls (slider, buttons, etc.) I looked at ... Python27\Lib\site-packages\matplotlib\backends\backend_wx.py , but couldn't find any way to access this windows in custom code. Would it be possible at all, or are there other options? Is there maybe some equivalent class/module etc. which could be reused or adapted? Or is the only way to reimplement the functionality writing my own plot gui (or to have the additionally needed controls in a separate window, which doesn't look very elegant, but could probably work). Thanks in advance for any hints regards Vlastimil Brom -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] reusing the pylab gui in a custom application (wxpython)?
2012/7/30 Benjamin Root ben.r...@ou.edu: On Sunday, July 29, 2012, Vlastimil Brom wrote: Hi all, I'd like to ask about the possibility to eventually reuse the gui of pylab for showing and manipulating the plots in the custom application (written in wxpython). [...] Thanks in advance for any hints regards Vlastimil Brom Absolutely! It is one of the things mpl does best. Do a search in the online documentation for embedding codex. I hope that helps! Ben Root Thanks for the quick response and a useful hint! I apparently didn't search for the right terms before... I turns out, that http://matplotlib.sourceforge.net/examples/user_interfaces/embedding_in_wx2.html shows exactly, what I need. By the way is there a place to propose a small correction of the example code? namely self.SetBackgroundColour(wx.NamedColor(WHITE)) causes an error in wxpython 2.9, which removed the ...Color aliases and only knows ...Colour hence: self.SetBackgroundColour(wx.NamedColour(WHITE)) works in wxpython 2.9 and should be backwards compatible too. Thanks again, vbr -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] plot() not using alpha value from RGBA tuple
2011/8/16 Eric Firing efir...@hawaii.edu: On 07/25/2011 08:21 AM, Ben Breslauer wrote: I think that I have found the problem here. Line2D.draw() (and I presume other Artist subclasses) calls gc.set_foreground(self._color) ... gc.set_alpha(self._alpha) self._color is defined by the color kwarg, whether it be a hex value, 3-tuple, 4-tuple, or something else. self._alpha is defined by the alpha kwarg, but if the alpha kwarg is None, it is not overwritten with color[3]. Therefore, using color=(R,G,B,A) does not set alpha correctly. I'm not sure the best (i.e. most matplotlib-like) way to change this so that the A value gets used iff alpha is None, but I've attached a patch that does it one way (diff'ed against the github master, commit 67b1cd650f574f9c53ce). I know the patch is less than ideal, as it adds kwarg-specific handling into a place where none had previously been done, and it's also in a for loop. Maybe it would be better to do the checking along with the scalex and scaley pops? Alpha handling is a real can of worms; it has gotten better, but as you note, there are still problems. Unfortunately, I don't think your proposed solution will work in general, because self._color could be a 4-letter string, like gray, in which case alpha would be set to y, and that would not be good at all. I suspect the right place to solve the problem is down in the GraphicsContext--although I thought I had already straightened that out some time ago. ... Eric Separately, I noticed that backend_bases.GraphicsContextBase.set_foreground claims to only expect an RGB definition, and not an RGBA definition. As such, I think that it should call self._rgb = colors.colorConverter.to_rgb(fg) instead of self._rgb = colors.colorConverter.to_rgba(fg) since that will make self._rgb a 3-tuple instead of a 4-tuple. Ben ... Just a remark for this recent proposed patch, as I unfortunately don't know the implications for the whole codebase. I believe, that the condition added in the patch if len(line._color) == 4 and line._alpha == None: could be adjusted to e.g.: if isinstance(line._color, tuple) and len(line._color) == 4 and line._alpha == None If the alpha value can be set in the color-tuple (for #RRGGBBAA some parsing would be needed, if it is accepted). Possibly the _alpha should be replace with tha alpha value of the colour passed this way like http://matplotlib.sourceforge.net/api/colors_api.html#matplotlib.colors.ColorConverter.to_rgba If arg is an RGBA sequence and alpha is not None, alpha will replace the original A. But as has been suggested already, it might be better adressed in some more general way, than in this single function. regards, vbr -- uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib backends - WXAgg vs. WX
2011/8/15 Michael Droettboom md...@stsci.edu: On 08/14/2011 11:28 AM, Vlastimil Brom wrote: ... Is there maybe some mechanism available in matplotlib, which would select the appropriate font for the given characters? (Like in wx or, even more powerful in tk?) Or is it the expected way to set the suitable font individually, as only the font list in rcParams are tried sequentially - regardless of the character support? That's correct: matplotlib doesn't currently do this. It renders a particular string of text with a single font and does not do font substitution for characters that are not in that font. The best practice is to use a font that contains the full set of characters, such as Arial or Deja Vu as you've discovered. There a lot of other i18n shortcomings to the way matplotlib supports text (such as a lack of bidi support). That's a large wheel to reinvent, so the solution would involve using a third-party text layout library such as pango, but I know there is licensing friction against that. It may be worth revisiting that at some point. Mike Thanks for the confirmation, I'll stick with this apporoach, as I didn't manage to fix the code for wx backend on the newest version (cf. above). Given the status of the non-Agg backends it might be more appropriate. Regards, vbr -- uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] matplotlib backends - WXAgg vs. WX
2011/8/14 Eric Firing efir...@hawaii.edu:
On 08/13/2011 01:11 PM, Vlastimil Brom wrote:
Hi all,
I'd like to ask a probably basic qustion about backends in matplotlib
- specifically with regard to WXAgg and WX.
What are the differences of the two, and what are the supposed
usecases, and maybe restrictions for them?
http://matplotlib.sourceforge.net/faq/installing_faq.html#backends
WXAgg is WX for window and widgets, but with all figure rendering done
using the Agg library to generate an image which is then displayed as
such by WX. There is the same sort of pair for gtk: gtkagg and plain
gtk. Only the *agg interactive backends are fully supported; it is
expected that not everything will work with the non-agg interactive
backends, and every now and then there is discussion of whether they
should be eliminated for that reason. Their only advantage, as far as I
know, is that under some circumstances, such as working remotely with X
on a slow link, the non-agg backends may be faster.
Using matplotlib/pylab pylab in a rather basic way I encountered
problems with both backends and would like to clarify the differences
before i try to find a fix.
using wxAgg I am not able to display unicode text (some accents,
non-latin scripts etc. e.g. in pylab.title(...) and otherwhere .
This is surprising; in general, unicode works with the *agg backends.
Maybe plain WX is finding some fonts that WXAgg is not finding?
Eric
Thanks for the reference and for the important info, that only wxagg
is considered fully supported as opposed to wx backend.
It appears, that in the current state, using the latest wxpython
2.9.2.1, it is indeed unusable, as no graph canvas is displayed at all
(at least on my setup - win 7, py-2.7), cf.:
#! Python
# -*- coding: utf-8 -*-
import wxversion
# wxversion.select('2.9.1') # 2.9.1.1 # plot ok
wxversion.select('2.9.2') # 2.9.2.1 # invalid transparent canvas
without any graph content
import wx
import matplotlib
matplotlib.use('WX')
import pylab
pylab.plot(range(3), range(3))
pylab.show()
Regarding wxagg, it seems, that the suggestion about unsuitable fonts
being used was correct;
after setting the font to Arial, adapted from:
http://matplotlib.sourceforge.net/examples/api/font_family_rc.html
all the characters in the title are displayed ok.
#! Python
# -*- coding: utf-8 -*-
import wxversion
wxversion.select('2.9.2') # 2.9.2.1
import wx
# setting the font to Arial - the title is displayed completely;
# with the default font only the latin-1 characters are shown
from matplotlib import rcParams
rcParams['font.family'] = 'sans-serif'
rcParams['font.sans-serif'] = ['Arial'] + rcParams['font.sans-serif']
#
import matplotlib
matplotlib.use('WXAgg')
import pylab
pylab.plot(range(3), range(3))
pylab.title(uabcd áčďéěíňóřšťúůýž äöüß ê αβγδ абвгд אבגד xyz)
pylab.show()
(using python 2.7.2, MPL 1.0.1; Win 7, Czech)
Is there maybe some machanism available in matplotlib, which would
select the appropriate font for the given characters? (Like in wx or,
even more powerful in tk?) Or is it the expected way to set the
suitable font individually, as only the font list in rcParams are
tried sequentially - regardless of the character support?
Regards,
vbr
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[Matplotlib-users] matplotlib backends - WXAgg vs. WX
Hi all,
I'd like to ask a probably basic qustion about backends in matplotlib
- specifically with regard to WXAgg and WX.
What are the differences of the two, and what are the supposed
usecases, and maybe restrictions for them?
Using matplotlib/pylab pylab in a rather basic way I encountered
problems with both backends and would like to clarify the differences
before i try to find a fix.
using wxAgg I am not able to display unicode text (some accents,
non-latin scripts etc. e.g. in pylab.title(...) and otherwhere .
Just changing:
matplotlib.use('WXAgg')
to
matplotlib.use('WX')
seemed to fix this, and the graph gui also looks more consistent with
my wxPython app.
However, using the current wxPython 2.9.2.1. (python 2.7.2, Win 7,
Czech) I see a more serious bug in the wx-backend (basically failing
to display the graph at all
(cf. http://sourceforge.net/mailarchive/message.php?msg_id=27902016 ),
which doesn't apply for WXAgg.
Coud someone maybe provide some hints, where I should look into to
understand the backend differences better?
Thanks in advance,
Regards,
Vlastimil Brom
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[Matplotlib-users] matplotlib/pylab problems with wxpython 2.9.2.1 -
Hi all,
I'd like to ask about some issues I am having with using matplotlib
with the latest wxpython version 2.9.1.1;
I already mentioned that on the wxpython list:
https://groups.google.com/forum/#!topic/wxpython-users/vG-5NJ4vXnc
but it is unclear whether this is a bug in wx or a possible problem
with the backend_wx which happened to be tolerated in wxpython
sofar.
Simple code using the WX backend seems to
work ok in 2.8.12.1 and 2.9.1.1 but not in 2.9.2.1.
The graph canvas is inactive and transparent - showing the
screen below this active frame; with resizing and moving this frame,
there are artefacts and display glitches and redrawing errors around
it, but the graph is not shown and there are no exceptions thrown.
(I am using Python 2.7.2, matplotlib 1.0.1; win 7 and Win XP; wxPython
32bit (unicode))
# # # # # # # # # # # pylab - wxPython # # # # # # # # # # # # # # # # #
#! Python
# -*- coding: utf-8 -*-
import wxversion
# wxversion.select('2.8') # 2.8.12.1 ok
# wxversion.select('2.9.1') # 2.9.1.1 ok
wxversion.select('2.9.2') # 2.9.2.1 !! display errors in pylab
import wx
import matplotlib # http://matplotlib.sourceforge.net/
# matplotlib.use('WXAgg') # ok in both, wx 2.8 and 2.9.x
matplotlib.use('WX')
import pylab
pylab.plot(range(3), range(3), label=a)
pylab.show()
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
A very simple version without pylab shows the same problem:
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#! Python
# -*- coding: utf-8 -*-
import wxversion
# wxversion.select('2.8')
wxversion.select('2.9.2')
import wx
import matplotlib
matplotlib.use('WX')
from matplotlib.backends.backend_wx import FigureCanvasWx as
FigureCanvas # err on wx 2.9.2
# from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as
FigureCanvas # ok
from matplotlib.figure import Figure
class CanvasFrame(wx.Frame):
def __init__(self, ):
wx.Frame.__init__(self, None, -1, 'CanvasFrame', size=(550,350))
self.figure = Figure()
self.axes = self.figure.add_subplot(111)
self.axes.plot(range(4),range(4))
self.figure_canvas = FigureCanvas(self, -1, self.figure)
self.sizer = wx.BoxSizer(wx.VERTICAL)
self.sizer.Add(self.figure_canvas, 1, wx.LEFT | wx.TOP | wx.GROW)
self.SetSizer(self.sizer)
if __name__=='__main__':
app = wx.App(False)
frm = CanvasFrame()
frm.Show(True)
app.MainLoop()
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
It is likely to depending on
matplotlib.backends.backend_wx :: FigureCanvasWx (or some inherited
classes), but I had sofar no success in finding the problematic code.
Could you maybe give any pointer where to look into, or maybe how to
activate some exception tracebacks etc? (Changing _DEBUG = 5 in
...\matplotlib\backends\backend_wx.py to other values doesn't seem to
have this effect).
Thanks in advance,
vbr
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