[Matplotlib-users] FuncFormatter and Colorbar
Hi to all! I have a question concerning reformatting of axis-ticks via the FuncFormatter-class. In german, it's common to use a comma as separator for decimal numbers instead of a dot. To realize it in matplotlib, I do something like from matplotlib.ticker import FuncFormatter import pylab pylab.figure() formatter = FuncFormatter(lambda x,pos: (%.2f%x).replace(.,,)) ax = pylab.axes() ax.xaxis.set_major_formatter(formatter) ax.yaxis.set_major_formatter(formatter) ax.plot(pylab.arange(0,1,0.1),pylab.arange(0,1,0.1)) This works fine for me, but I encounter a problem when I do an imshow-command with a colorbar. In the imshow-axes, it's o.k., but for the colorbar it doesn't really work. I do cb = pylab.colorbar() cb.ax.yaxis.set_major_formatter(formatter) and, actually, all dots are replaced by com9mata, but the values are also changed! E.g. instead of the old values (without formatter) from 0-0.54, the values are increased to 0-0.95. The complete code for this example would be: from matplotlib.ticker import FuncFormatter, ScalarFormatter import pylab pylab.figure() formatter = FuncFormatter(lambda x,pos: (%.2f%x).replace(.,,)) ax = pylab.axes() ax.xaxis.set_major_formatter(formatter) ax.yaxis.set_major_formatter(formatter) data = pylab.zeros((100,100),d) data[10,10] = 0.567 pylab.imshow(data) cb = pylab.colorbar() cb.ax.yaxis.set_major_formatter(formatter) Can anyone explain why it doesn't work out as I expect it to work? Or is there a better, more standard way to substitute the dots by commata? Thanks, Thorsten - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Unable to compile matplotlib 0.91.2 on windows
2008/1/9, Charlie Moad [EMAIL PROTECTED]: Just a guess. Did you download the visual studio static libraries instead of the mingw ones? Those linking symbols listed lend me to think this. The visual studio ones end in _vs.tar.gz. You want this: http://matplotlib.sourceforge.net/win32_static.tar.gz - Charlie Oooops! I exactly did that. Unfortunately I haven't noticed the file names were different, so I thought visual studio and mingw were using the same package and downloaded the wrong one. Thanks a lot, now it built correctly. If you are interested, I slightly modified the package to be less confusing =) and, possibly, easier to use. These are the changes I made to it: - bundled pexports. It comes with license (GPL) and source, so no problems at all doing it; - be more agnostic about mingw, python paths and python versions; - reflect the fact that mingw, msys, gtk+ nowadays have installers that do set most environment variables correctly. So it's no more needed to override PATH with scripts; - removed some unneeded files; - update the README instructions reflecting the changes and fixed with up-to date links. You can find it: http://bproofs.homeunix.org/build/win32_static.tar.gz Thanks again. Bye, Francesco - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] problem with ticker and mathtext
Hello list,
the little example below seems to fail, can anybody help me?
I'm on Debian using the release 0.91.2.
best regards and thanks in advance for any hints,
Matthias
---
from matplotlib.ticker import ScalarFormatter
from matplotlib.pyplot import *
ax = axes()
axis([0.0, 10**-7, 0, 10**-7])
ax.yaxis.set_major_formatter(ScalarFormatter(useMathText=True))
show()
error message:
/scratch/michler/SOFT/lib/python2.4/site-packages/matplotlib/mathtext.py:722:
MathTextWarning: Unrecognized symbol '\times'. Substituting with a dummy
symbol.
% sym.encode('ascii', 'backslashreplace'), MathTextWarning)
the string '\times' is due to line
sciNotStr = r'{\times}'+self.format_data(10**self.orderOfMagnitude)
in function ScalarFormatter.get_offset
-
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Re: [Matplotlib-users] FuncFormatter and Colorbar
Hello list,
Hello Thorsten,
On Wednesday 09 January 2008 11:38, Thorsten Kranz wrote:
I have a question concerning reformatting of axis-ticks via the
FuncFormatter-class. In german, it's common to use a comma as separator for
decimal numbers instead of a dot. To realize it in matplotlib, I do
something like
from matplotlib.ticker import FuncFormatter
import pylab
pylab.figure()
formatter = FuncFormatter(lambda x,pos: (%.2f%x).replace(.,,))
ax = pylab.axes()
ax.xaxis.set_major_formatter(formatter)
ax.yaxis.set_major_formatter(formatter)
ax.plot(pylab.arange(0,1,0.1),pylab.arange(0,1,0.1))
This works fine for me,
I had the same idea ;-). The problem is that you have a fixed number of digits
behind the comma, which is not the desirable behaviour during zoom.
I changed the ticker.py/ axes.py files to circumwait this disadvantage. I
attached a patch showing my changes and maybe somebody can test it.
You can activate it using:
ax.ticklabel_format(style='comma')
for an ScalarFormatter
but I encounter a problem when I do an
imshow-command with a colorbar. In the imshow-axes, it's o.k., but for the
colorbar it doesn't really work. I do
cb = pylab.colorbar()
cb.ax.yaxis.set_major_formatter(formatter)
and, actually, all dots are replaced by com9mata, but the values are also
changed! E.g. instead of the old values (without formatter) from 0-0.54,
the
values are increased to 0-0.95.
[...]
Can anyone explain why it doesn't work out as I expect it to work?
I don't know were the problem comes from. I attached your example in a slitly
modified version and this shows that the problem is not due to your special
formatting. It occurs with matplotlib.ticker.ScalarFormatter, too.
best regards,
Matthias
Or is there a better, more standard way to substitute the dots by commata?
Thanks,
Thorsten
Index: ticker.py
===
--- ticker.py (revision 4805)
+++ ticker.py (working copy)
@@ -272,13 +272,15 @@
such that the tick labels are meaningful. Scientific notation is used for
data 1e-3 or data = 1e4.
-def __init__(self, useOffset=True, useMathText=False):
+def __init__(self, useOffset=True, useMathText=False, useComma=False):
# useOffset allows plotting small data ranges with large offsets:
# for example: [1+1e-9,1+2e-9,1+3e-9]
# useMathText will render the offset and scientific notation in mathtext
+# useComma leads to comma (',') as decimal separator
self._useOffset = useOffset
self._usetex = rcParams['text.usetex']
self._useMathText = useMathText
+self._useComma = useComma
self.offset = 0
self.orderOfMagnitude = 0
self.format = ''
@@ -327,11 +329,17 @@
if self.offset:
offsetStr = self.format_data(self.offset)
if self.offset 0: offsetStr = '+' + offsetStr
+if self._useComma:
+if self._usetex:
+offsetStr = offsetStr.replace('.','{,}')
+else:
+offsetStr = offsetStr.replace('.',',')
if self.orderOfMagnitude:
if self._usetex or self._useMathText:
sciNotStr = r'{\times}'+self.format_data(10**self.orderOfMagnitude)
else:
sciNotStr = u'\xd7'+'1e%d'% self.orderOfMagnitude
+
if self._useMathText:
return ''.join(('$\mathdefault{',sciNotStr,offsetStr,'}$'))
elif self._usetex:
@@ -406,7 +414,13 @@
def pprint_val(self, x):
xp = (x-self.offset)/10**self.orderOfMagnitude
if npy.absolute(xp) 1e-8: xp = 0
-return self.format % xp
+if self._useComma:
+if self._usetex:
+return (self.format % xp).replace('.','{,}')
+else:
+return (self.format % xp).replace('.',',')
+else:
+return self.format % xp
def _formatSciNotation(self, s):
# transform 1e+004 into 1e4, for example
Index: axes.py
===
--- axes.py (revision 4805)
+++ axes.py (working copy)
@@ -1438,8 +1438,9 @@
used by default for linear axes.
kwargs:
-style = 'sci' (or 'scientific') or 'plain';
-plain turns off scientific notation
+style = 'sci' (or 'scientific') or 'plain' or 'comma';
+plain/comma turns off scientific notation
+comma enables decimal seperator ','
axis = 'x', 'y', or 'both'
Only the major ticks are affected.
@@ -1452,15 +1453,13 @@
style = kwargs.pop('style', '').lower()
axis = kwargs.pop('axis', 'both').lower()
+cb = False
if style[:3] == 'sci':
sb = True
elif style in
[Matplotlib-users] Can't run matplotlib without tk backend on windows?
Hi, after having correctly compiled matplotlib, now is time to test
something (I need at least to get it something working before I can
start hack it autonomously =). Unfortunately, it's not usable: it
complains about not being able to load _tkagg module. The fact is I
don't want tkagg backend at all! Here is the backends dependencies
detect log:
OPTIONAL BACKEND DEPENDENCIES
libpng: found, but unknown version (no pkg-config)
Tkinter: no
* Tkinter present, but header files are not found.
* You may need to install development packages.
wxPython: no
* wxPython not found
Gtk+: gtk+: 2.10.11, glib: 2.12.11, pygtk: 2.10.6,
pygobject: 2.12.3
Qt: no
Qt4: no
Cairo: 1.2.6
As it should be clear, I want to use the a gtk+ aware backend, and
initially in fact I used a customized setup.cfg; seeing the error I
tryed deleting the customized setup.cfg, but without results. Is
there some problems with backend selection on windows platform?
I hope gtk+ backends are supported. Follows 2 traces of the error
running an ipython shell and a test python program (it works on
linux).
Any help is appreciated.
Thanks,
Francesco
---
Here is the trace in ipython trying to run sample test program:
In [3]: run lab1_ex2.py
ImportError Traceback (most recent call last)
C:\Documents and Settings\Public\desktop\lab1_ex2.py in module()
1 from numpy import *
2 from scipy import *
3 from pylab import *
4
5 n=100
c:\python25\Lib\site-packages\pylab.py in module()
1
2
3 from matplotlib.pylab import *
4 import matplotlib.pylab
5 __doc__ = matplotlib.pylab.__doc__
c:\python25\Lib\site-packages\matplotlib\pylab.py in module()
290
291
-- 292 from matplotlib.pyplot import *
293
294
c:\python25\Lib\site-packages\matplotlib\pyplot.py in module()
35
36 from matplotlib.backends import pylab_setup
--- 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
38
39 def switch_backend(newbackend):
c:\python25\Lib\site-packages\matplotlib\backends\__init__.py in pylab_setup()
22 backend_name = 'backend_'+backend.lower()
23 backend_mod = __import__('matplotlib.backends.'+backend_name,
--- 24 globals(),locals(),[backend_name])
25
26 # Things we pull in from all backends
c:\python25\Lib\site-packages\matplotlib\backends\backend_tkagg.py in module()
6
7 import Tkinter as Tk, FileDialog
8 import tkagg # Paint image to Tk photo blitter extension
9 from backend_agg import FigureCanvasAgg
10
c:\python25\Lib\site-packages\matplotlib\backends\tkagg.py in module()
1
2
3 import _tkagg
4 import Tkinter as Tk
5
6 def blit(photoimage, aggimage, bbox=None, colormode=1):
7 tk = photoimage.tk
ImportError: No module named _tkagg
WARNING: Failure executing file: lab1_ex2.py
---
Here is another trace trying to run ipython with --pylab switch:
Traceback (most recent call last):
File C:\Python25\scripts\ipython, line 27, in module
IPython.Shell.start().mainloop()
File C:\Python25\lib\site-packages\IPython\Shell.py, line 1152, in start
return shell(user_ns = user_ns)
File C:\Python25\lib\site-packages\IPython\Shell.py, line 1049, in __init__
shell_class=MatplotlibShell)
File C:\Python25\lib\site-packages\IPython\Shell.py, line 74, in __init__
debug=debug,shell_class=shell_class)
File C:\Python25\Lib\site-packages\IPython\ipmaker.py, line 95, in make_IPyt
hon
embedded=embedded,**kw)
File C:\Python25\lib\site-packages\IPython\Shell.py, line 589, in __init__
user_ns,b2 = self._matplotlib_config(name,user_ns)
File C:\Python25\lib\site-packages\IPython\Shell.py, line 530, in _matplotli
b_config
import matplotlib.pylab as pylab
File c:\python25\Lib\site-packages\matplotlib\pylab.py, line 292, in module
from matplotlib.pyplot import *
File c:\python25\Lib\site-packages\matplotlib\pyplot.py, line 37, in module
new_figure_manager, draw_if_interactive, show = pylab_setup()
File c:\python25\Lib\site-packages\matplotlib\backends\__init__.py, line 24,
in pylab_setup
globals(),locals(),[backend_name])
File c:\python25\Lib\site-packages\matplotlib\backends\backend_tkagg.py, lin
e 8, in module
import tkagg # Paint image to Tk photo blitter extension
File c:\python25\Lib\site-packages\matplotlib\backends\tkagg.py, line 1, in
module
import _tkagg
ImportError: No module named _tkagg
-
Check
Re: [Matplotlib-users] Can't run matplotlib without tk backend on windows?
You need to set a different backend in your matplotlibrc or specify it first.
import matplotlib
matplotlib.use('Agg')
You can also run scripts passing the backend:
python lab1_ex2.py -dAgg
On Jan 9, 2008 8:41 AM, Francesco Pretto [EMAIL PROTECTED] wrote:
Hi, after having correctly compiled matplotlib, now is time to test
something (I need at least to get it something working before I can
start hack it autonomously =). Unfortunately, it's not usable: it
complains about not being able to load _tkagg module. The fact is I
don't want tkagg backend at all! Here is the backends dependencies
detect log:
OPTIONAL BACKEND DEPENDENCIES
libpng: found, but unknown version (no pkg-config)
Tkinter: no
* Tkinter present, but header files are not found.
* You may need to install development packages.
wxPython: no
* wxPython not found
Gtk+: gtk+: 2.10.11, glib: 2.12.11, pygtk: 2.10.6,
pygobject: 2.12.3
Qt: no
Qt4: no
Cairo: 1.2.6
As it should be clear, I want to use the a gtk+ aware backend, and
initially in fact I used a customized setup.cfg; seeing the error I
tryed deleting the customized setup.cfg, but without results. Is
there some problems with backend selection on windows platform?
I hope gtk+ backends are supported. Follows 2 traces of the error
running an ipython shell and a test python program (it works on
linux).
Any help is appreciated.
Thanks,
Francesco
---
Here is the trace in ipython trying to run sample test program:
In [3]: run lab1_ex2.py
ImportError Traceback (most recent call last)
C:\Documents and Settings\Public\desktop\lab1_ex2.py in module()
1 from numpy import *
2 from scipy import *
3 from pylab import *
4
5 n=100
c:\python25\Lib\site-packages\pylab.py in module()
1
2
3 from matplotlib.pylab import *
4 import matplotlib.pylab
5 __doc__ = matplotlib.pylab.__doc__
c:\python25\Lib\site-packages\matplotlib\pylab.py in module()
290
291
-- 292 from matplotlib.pyplot import *
293
294
c:\python25\Lib\site-packages\matplotlib\pyplot.py in module()
35
36 from matplotlib.backends import pylab_setup
--- 37 new_figure_manager, draw_if_interactive, show = pylab_setup()
38
39 def switch_backend(newbackend):
c:\python25\Lib\site-packages\matplotlib\backends\__init__.py in pylab_setup()
22 backend_name = 'backend_'+backend.lower()
23 backend_mod = __import__('matplotlib.backends.'+backend_name,
--- 24 globals(),locals(),[backend_name])
25
26 # Things we pull in from all backends
c:\python25\Lib\site-packages\matplotlib\backends\backend_tkagg.py in
module()
6
7 import Tkinter as Tk, FileDialog
8 import tkagg # Paint image to Tk photo blitter
extension
9 from backend_agg import FigureCanvasAgg
10
c:\python25\Lib\site-packages\matplotlib\backends\tkagg.py in module()
1
2
3 import _tkagg
4 import Tkinter as Tk
5
6 def blit(photoimage, aggimage, bbox=None, colormode=1):
7 tk = photoimage.tk
ImportError: No module named _tkagg
WARNING: Failure executing file: lab1_ex2.py
---
Here is another trace trying to run ipython with --pylab switch:
Traceback (most recent call last):
File C:\Python25\scripts\ipython, line 27, in module
IPython.Shell.start().mainloop()
File C:\Python25\lib\site-packages\IPython\Shell.py, line 1152, in start
return shell(user_ns = user_ns)
File C:\Python25\lib\site-packages\IPython\Shell.py, line 1049, in
__init__
shell_class=MatplotlibShell)
File C:\Python25\lib\site-packages\IPython\Shell.py, line 74, in __init__
debug=debug,shell_class=shell_class)
File C:\Python25\Lib\site-packages\IPython\ipmaker.py, line 95, in
make_IPyt
hon
embedded=embedded,**kw)
File C:\Python25\lib\site-packages\IPython\Shell.py, line 589, in __init__
user_ns,b2 = self._matplotlib_config(name,user_ns)
File C:\Python25\lib\site-packages\IPython\Shell.py, line 530, in
_matplotli
b_config
import matplotlib.pylab as pylab
File c:\python25\Lib\site-packages\matplotlib\pylab.py, line 292, in
module
from matplotlib.pyplot import *
File c:\python25\Lib\site-packages\matplotlib\pyplot.py, line 37, in
module
new_figure_manager, draw_if_interactive, show = pylab_setup()
File c:\python25\Lib\site-packages\matplotlib\backends\__init__.py, line
24,
in pylab_setup
globals(),locals(),[backend_name])
File
Re: [Matplotlib-users] Can't run matplotlib without tk backend on windows?
On Wednesday 09 January 2008 09:27:39 am Francesco Pretto wrote:
2008/1/9, Charlie Moad [EMAIL PROTECTED]:
You need to set a different backend in your matplotlibrc or specify it
first.
import matplotlib
matplotlib.use('Agg')
You can also run scripts passing the backend:
python lab1_ex2.py -dAgg
Oh, thanks. That really seems a RTFM...
However, in linux i hadn't to select the backend, i just configure
setup.cfg to exclude backends and, after compiling, matplotlib was
running just fine choosing the right backend (gtk or gtkagg). Isn't
this a sign that matplotlib isn't able to detect the correct default
backend at compile time (at least on windows)?
However, thanks again. As promised, now I'll try to be more autonomous ;-)
setup.py attempts to select the appropriate backend for you, based on what
backends were available at build time. That selection is written into the
default matplotlibrc file, which resides in
site-packages/matplotlib/mpl-data. If matplotlib finds another matplotlibrc
file (for example, in the current working directory, in $HOME/.matplotlib,
etc), then it will use those settings instead. I would guess that is the
source of the problem.
Darren
-
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Re: [Matplotlib-users] FuncFormatter and Colorbar
Hi list, Hi Matthias, I found another way to deal with this problem. when defining the colorbar, one can give an additional kwarg format, so by defining the kwarg format=formatter, we solved the problem. Anyway, I think an option as Matthias implemented would be very handy for all those users like us here in Germany who might want to have the numbers formatted with commata. Greetings, Thorsten 2008/1/9, Matthias Michler [EMAIL PROTECTED]: Hello list, Hello Thorsten, On Wednesday 09 January 2008 11:38, Thorsten Kranz wrote: I have a question concerning reformatting of axis-ticks via the FuncFormatter-class. In german, it's common to use a comma as separator for decimal numbers instead of a dot. To realize it in matplotlib, I do something like from matplotlib.ticker import FuncFormatter import pylab pylab.figure() formatter = FuncFormatter(lambda x,pos: (%.2f%x).replace(.,,)) ax = pylab.axes() ax.xaxis.set_major_formatter(formatter) ax.yaxis.set_major_formatter(formatter) ax.plot(pylab.arange(0,1,0.1),pylab.arange(0,1,0.1)) This works fine for me, I had the same idea ;-). The problem is that you have a fixed number of digits behind the comma, which is not the desirable behaviour during zoom. I changed the ticker.py/ axes.py files to circumwait this disadvantage. I attached a patch showing my changes and maybe somebody can test it. You can activate it using: ax.ticklabel_format(style='comma') for an ScalarFormatter but I encounter a problem when I do an imshow-command with a colorbar. In the imshow-axes, it's o.k., but for the colorbar it doesn't really work. I do cb = pylab.colorbar() cb.ax.yaxis.set_major_formatter(formatter) and, actually, all dots are replaced by com9mata, but the values are also changed! E.g. instead of the old values (without formatter) from 0-0.54, the values are increased to 0-0.95. [...] Can anyone explain why it doesn't work out as I expect it to work? I don't know were the problem comes from. I attached your example in a slitly modified version and this shows that the problem is not due to your special formatting. It occurs with matplotlib.ticker.ScalarFormatter, too. best regards, Matthias Or is there a better, more standard way to substitute the dots by commata? Thanks, Thorsten - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Can't run matplotlib without tk backend on windows?
2008/1/9, Charlie Moad [EMAIL PROTECTED]:
You need to set a different backend in your matplotlibrc or specify it first.
import matplotlib
matplotlib.use('Agg')
You can also run scripts passing the backend:
python lab1_ex2.py -dAgg
Oh, thanks. That really seems a RTFM...
However, in linux i hadn't to select the backend, i just configure
setup.cfg to exclude backends and, after compiling, matplotlib was
running just fine choosing the right backend (gtk or gtkagg). Isn't
this a sign that matplotlib isn't able to detect the correct default
backend at compile time (at least on windows)?
However, thanks again. As promised, now I'll try to be more autonomous ;-)
Greetins,
Francesco
-
Check out the new SourceForge.net Marketplace.
It's the best place to buy or sell services for
just about anything Open Source.
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Re: [Matplotlib-users] Can't run matplotlib without tk backend on windows?
2008/1/9, Darren Dale [EMAIL PROTECTED]: setup.py attempts to select the appropriate backend for you, based on what backends were available at build time. That selection is written into the default matplotlibrc file, which resides in site-packages/matplotlib/mpl-data. If matplotlib finds another matplotlibrc file (for example, in the current working directory, in $HOME/.matplotlib, etc), then it will use those settings instead. I would guess that is the source of the problem. No, the problem is the default installed matplotlibrc, that is not different from the one present in the source tree and has the default selection: backend : TkAgg Now, i don't know if the build script is trying to modify it according user selection or compile-time backend detection, but I'm wondering why the same problem wasn't happening on linux, where I tipically never install Tk runtime. However, for me the problem is solved, but if there's a matplotlib windows dev listening, here is my experience; first, i removed the already installed lib/site-packages/matplotlib/mpl-data/matplotlibrc . Afer, I went for clean compiling with a setup.cfg with these configurations: gtk = True gtkagg = False tkagg = False wxagg = False backend = GTK Eventually, python setup.py install write again a site-packages/matplotlib/mpl-data/matplotlibrc which still have: backend : TkAgg If this shouldn't happen, well, consider this a bug report :D Greetings, Francesco Pretto - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Can't run matplotlib without tk backend on windows?
On Wednesday 09 January 2008 10:15:54 am Francesco Pretto wrote: 2008/1/9, Darren Dale [EMAIL PROTECTED]: setup.py attempts to select the appropriate backend for you, based on what backends were available at build time. That selection is written into the default matplotlibrc file, which resides in site-packages/matplotlib/mpl-data. If matplotlib finds another matplotlibrc file (for example, in the current working directory, in $HOME/.matplotlib, etc), then it will use those settings instead. I would guess that is the source of the problem. No, the problem is the default installed matplotlibrc, that is not different from the one present in the source tree and has the default selection: backend : TkAgg Now, i don't know if the build script is trying to modify it according user selection or compile-time backend detection, but I'm wondering why the same problem wasn't happening on linux, where I tipically never install Tk runtime. However, for me the problem is solved, but if there's a matplotlib windows dev listening, here is my experience; first, i removed the already installed lib/site-packages/matplotlib/mpl-data/matplotlibrc . Afer, I went for clean compiling with a setup.cfg with these configurations: gtk = True gtkagg = False tkagg = False wxagg = False backend = GTK Eventually, python setup.py install write again a site-packages/matplotlib/mpl-data/matplotlibrc which still have: backend : TkAgg If this shouldn't happen, well, consider this a bug report :D Oh, I see. Look at line 238 in setup.py. Maybe we don't need that check for sys.platform anymore, now that we have setup.cfg. I think that check was in there for the benefit of building the windows installers, which we wanted to default to tkagg. I think it would be best to use a setup.cfg to set the numerix and backends when building the windows installers. Charlie, does that sound alright? Darren - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] problem with ticker and mathtext
The default mathtext font should have the times symbol. Are you
making any other changes that would affect the selection of mathtext
fonts? (Can you please attach a copy of your matplotlibrc file?) If
that looks ok, perhaps it isn't finding the math fonts correctly. There
are a multitude of reasons that could be happening. It is sometimes
helpful to set verbose.level to debug-annoying and then look at the
logs to see what might be going on. Also, you could try deleting the
fonts cache in ~/.matplotlib/fontManager.cache to force it to regenerate.
Cheers,
Mike
Matthias Michler wrote:
Hello list,
the little example below seems to fail, can anybody help me?
I'm on Debian using the release 0.91.2.
best regards and thanks in advance for any hints,
Matthias
---
from matplotlib.ticker import ScalarFormatter
from matplotlib.pyplot import *
ax = axes()
axis([0.0, 10**-7, 0, 10**-7])
ax.yaxis.set_major_formatter(ScalarFormatter(useMathText=True))
show()
error message:
/scratch/michler/SOFT/lib/python2.4/site-packages/matplotlib/mathtext.py:722:
MathTextWarning: Unrecognized symbol '\times'. Substituting with a dummy
symbol.
% sym.encode('ascii', 'backslashreplace'), MathTextWarning)
the string '\times' is due to line
sciNotStr = r'{\times}'+self.format_data(10**self.orderOfMagnitude)
in function ScalarFormatter.get_offset
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[Matplotlib-users] Arrows that shimmy
Hi all,
I' ve been using matplotlib to create some animations and it seems
that the endpoints for arrow polygon lines are being rounded off to
the nearest pixel. At least thats my guess. When viewing an animation
the arrow changes shape and distorts as it moves around. The code
below shows it on my Windows XP system where I'm using Matplotlib
0.91.1, SciPy 0.6.0, Numpy 1.0.4, Python 2.4. (The code is adapted
from examples/animation_blit_tk.py) I've also seen this on my Linux
setup when producing .png's for animation. I think I also remember
noticing circle patches having discrete movements, so it may be more
general than arrows.
I'm wondering if other's find this to be a problem. Its
distracting in my particular case. What can I do to help change this?
I've been enjoying matplotlib along with basemap for the past two
years and would like to help out if I can.
Norm.
- - - - - -
import matplotlib
matplotlib.use('TkAgg')
import sys
import pylab as p
from matplotlib.patches import Arrow
ax = p.subplot(111)
canvas = ax.figure.canvas
def run(*args):
background = canvas.copy_from_bbox(ax.bbox)
while 1:
canvas.restore_region(background)
ells = [Arrow(x = i/20.+ (run.cnt+1)/16000.,
y = 0.4+ (run.cnt+1)/3.,
dx = 0.04 + 1/200.,
dy = 0.06,
width=0.03)
for i in xrange(10)]
for e in ells:
ax.add_artist(e)
for e in ells:
ax.draw_artist(e)
canvas.blit(ax.bbox)
for e in ells:
e.remove()
if run.cnt==1000:
sys.exit()
run.cnt += 1
run.cnt = 0
p.subplots_adjust(left=0.3, bottom=0.3)
p.grid()
manager = p.get_current_fig_manager()
manager.window.after(100, run)
p.show()
- - - - - -
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Re: [Matplotlib-users] Arrows that shimmy
Norman,
There is code (in 0.91, going back before my time) that rounds the
vertices of polygons (which arrows in effect are) to the center of
pixels. You can see it here inside RendererAgg::draw_polygon() in
_backend_agg.cpp:
agg::path_storage path;
for (size_t j=0; jNpoints; j++) {
double x = xs[j];
double y = ys[j];
//snapto pixel centers
x = (int)x + 0.5;
y = (int)y + 0.5;
if (j==0) path.move_to(x,y);
else path.line_to(x,y);
}
path.close_polygon();
You could comment out these two lines:
x = (int)x + 0.5;
y = (int)y + 0.5;
and see if that corrects your wiggliness problem, just to confirm that
as the source.
The bigger question is -- there was probably a good reason that this
code was put in there in the first place, so it probably isn't a good
idea to remove it en masse. It may need to be exposed as an argument so
some things get this behavior and others don't. I know that dashed
lines that are perpendicular to the edges of the figure (e.g. grid
lines) look much worse if they aren't rounded to pixel centers. But in
general for polygons, I don't know if that's true.
Now to veer away from your question a little bit --
On the transforms branch (which is now in SVN head, and not in any
release), this behavior has changed. The new heuristic is that if a
path (which includes everything including lines and polygons) includes
only straight and axis-aligned segments, it is rounded. If it includes
any curves or non-axis-aligned segments it is not rounded. This
heuristic seems to work quite well in practice, since it includes grid
lines, non-rotated rectangles etc., but I am interested in getting
feedback from other users if that heuristic fails in any special
circumstances.
Cheers,
Mike
Norman Davis wrote:
Hi all,
I' ve been using matplotlib to create some animations and it seems
that the endpoints for arrow polygon lines are being rounded off to
the nearest pixel. At least thats my guess. When viewing an animation
the arrow changes shape and distorts as it moves around. The code
below shows it on my Windows XP system where I'm using Matplotlib
0.91.1, SciPy 0.6.0, Numpy 1.0.4, Python 2.4. (The code is adapted
from examples/animation_blit_tk.py) I've also seen this on my Linux
setup when producing .png's for animation. I think I also remember
noticing circle patches having discrete movements, so it may be more
general than arrows.
I'm wondering if other's find this to be a problem. Its
distracting in my particular case. What can I do to help change this?
I've been enjoying matplotlib along with basemap for the past two
years and would like to help out if I can.
Norm.
- - - - - -
import matplotlib
matplotlib.use('TkAgg')
import sys
import pylab as p
from matplotlib.patches import Arrow
ax = p.subplot(111)
canvas = ax.figure.canvas
def run(*args):
background = canvas.copy_from_bbox(ax.bbox)
while 1:
canvas.restore_region(background)
ells = [Arrow(x = i/20.+ (run.cnt+1)/16000.,
y = 0.4+ (run.cnt+1)/3.,
dx = 0.04 + 1/200.,
dy = 0.06,
width=0.03)
for i in xrange(10)]
for e in ells:
ax.add_artist(e)
for e in ells:
ax.draw_artist(e)
canvas.blit(ax.bbox)
for e in ells:
e.remove()
if run.cnt==1000:
sys.exit()
run.cnt += 1
run.cnt = 0
p.subplots_adjust(left=0.3, bottom=0.3)
p.grid()
manager = p.get_current_fig_manager()
manager.window.after(100, run)
p.show()
- - - - - -
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Operated by AURA for NASA
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[Matplotlib-users] screen colors invert with matplotlib
I've recently started using matplotlib on new unix box and I'm running in to an odd problem. I'm not sure what the root cause is (my linux installation, graphics drivers, matplotlib, or something else) but I thought I would ask here to see if anyone else had experienced this. OS: Fedora Core 8 Video Card: Nvidia GeForce 8800 Ultra Driver: Latest Unix driver from Nvidia (169.07, release date: Dec 20, 2007) Matplotlib version: matplotlib-0.91.2.tar.gz (built from source) Backend chosen: qt4agg Qt4 version: 4.3.3 The problem: If a matplotlib plot window ever has focus, the screen colors on the whole screen invert themselves. White becomes black, etc. I can probably post a link to a screenshot if that will help, but it looks like a simple color inversion to me. If the plot window doesn't have focus, everything is drawn correctly. My simple test was: $ ipython -pylab In [1]: plot(range(10)) With older versions of matplotlib, the colors did not invert-the screen went totally black when the plot window had focus. When it doesn't, everything looks fine. I'm not seeing this behavior with any other application so far. If upgrading to the SVN trunk version would help, I'm willing to give that a try. But I wanted to get some feedback before updating anything else. Thanks, -Dan - Dan Karipides Tech-X Corporation [EMAIL PROTECTED] - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Arrows that shimmy
On Jan 9, 2008 9:11 AM, Michael Droettboom [EMAIL PROTECTED] wrote: You could comment out these two lines: x = (int)x + 0.5; y = (int)y + 0.5; and see if that corrects your wiggliness problem, just to confirm that as the source. The bigger question is -- there was probably a good reason that this code was put in there in the first place, so it probably isn't a good idea to remove it en masse. It may need to be exposed as an argument so some things get this behavior and others don't. I know that dashed lines that are perpendicular to the edges of the figure (e.g. grid lines) look much worse if they aren't rounded to pixel centers. But in general for polygons, I don't know if that's true. For subpixel accuracy in rendering, agg antialiasing causes different line segments to appear different in their thicknesses if they do not have the same subpixel values. Maxim wrote the following essay on the subject: http://antigrain.com/tips/line_alignment/line_alignment.agdoc.html#PAGE_LINE_ALIGNMENT For this reason, to preserve visible consistency of the segments, I have several parts in the agg code which snaps the vertices ot the pixel centers. I have never found a solution that seems to work in all cases, since removing the snapto code will cause the inconsistencies referred to above. I think should probably be a graphics context property (which could get the information from an artist property) so at least the user could control it when needed. JDH - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] screen colors invert with matplotlib
On Jan 9, 2008 10:14 AM, Dan Karipides [EMAIL PROTECTED] wrote: OS: Fedora Core 8 Video Card: Nvidia GeForce 8800 Ultra Driver: Latest Unix driver from Nvidia (169.07, release date: Dec 20, 2007) Matplotlib version: matplotlib-0.91.2.tar.gz (built from source) Backend chosen: qt4agg Hi Dan, No one has ever reported anything like this before as far as I know. Could you try running a simple test script with a different GUI backend, eg tkagg or gtkagg python simple_plot.py -dTkAgg #or GTKAgg I assume this is a qt4 problem, but I'd just like to confirm before we proceed. Do you see it with qtagg or just qt4agg? - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] [PATCH] Legend with numpoints = 1
Included below is an updated patch fixing the legend with numpoints=1. The patch has been made against SVN and works for Line2D, LineCollection, Patch, and RegularPolyCollection. The patch could be merged. I also think the patch could be improved. Currently, handle._marker is examined to determine if the legend should contain lines or symbols, but this is done in the _get_handles function. It would be better if that could be moved into the Legend class definition, however, I do not know how to examine handle._marker in the Legend class definition. Again, I would appreciate any comments or improvements. Thanks, Paul diff -u a/lib/matplotlib/legend.py b/lib/matplotlib/legend.py --- a/lib/matplotlib/legend.py 2008-01-09 13:11:00.0 -0600 +++ b/lib/matplotlib/legend.py 2008-01-09 13:08:36.0 -0600 @@ -175,9 +175,7 @@ # make a trial box in the middle of the axes. relocate it # based on it's bbox left, top = 0.5, 0.5 -if self.numpoints == 1: -self._xdata = npy.array([left + self.handlelen*0.5]) -else: +if self.numpoints 1: self._xdata = npy.linspace(left, left + self.handlelen, self.numpoints) textleft = left+ self.handlelen+self.handletextsep self.texts = self._get_texts(labels, textleft, top) @@ -236,6 +234,7 @@ def _get_handles(self, handles, texts): HEIGHT = self._approx_text_height() +left = 0.5 ret = [] # the returned legend lines @@ -243,6 +242,10 @@ x, y = label.get_position() x -= self.handlelen + self.handletextsep if isinstance(handle, Line2D): +if self.numpoints == 1 and handle._marker == 'None': +self._xdata = npy.linspace(left, left + self.handlelen, 2) +elif self.numpoints == 1: +self._xdata = npy.array([left + self.handlelen*0.5]) ydata = (y-HEIGHT/2)*npy.ones(self._xdata.shape, float) legline = Line2D(self._xdata, ydata) legline.update_from(handle) @@ -253,7 +256,8 @@ ret.append(legline) elif isinstance(handle, Patch): - +if self.numpoints == 1: +self._xdata = npy.linspace(left, left + self.handlelen, 2) p = Rectangle(xy=(min(self._xdata), y-3/4*HEIGHT), width = self.handlelen, height=HEIGHT/2, ) @@ -263,6 +267,8 @@ p.set_clip_path(None) ret.append(p) elif isinstance(handle, LineCollection): +if self.numpoints == 1: +self._xdata = npy.linspace(left, left + self.handlelen, 2) ydata = (y-HEIGHT/2)*npy.ones(self._xdata.shape, float) legline = Line2D(self._xdata, ydata) self._set_artist_props(legline) @@ -277,6 +283,8 @@ ret.append(legline) elif isinstance(handle, RegularPolyCollection): +if self.numpoints == 1: +self._xdata = npy.array([left]) p = Rectangle(xy=(min(self._xdata), y-3/4*HEIGHT), width = self.handlelen, height=HEIGHT/2, ) Michael Droettboom wrote: I'm sure the radio silence to your question is just due to holidays. Thanks for looking into this. I'd be happy to incorporate your patch when it is ready. As for your question about plots that can include patches -- patches are virtually anything plotted that aren't lines or images. This includes rectangles, polygons and ellipses, for instance. See something like ellipse_demo.py for an example. Patches are always drawn as rectangles in the legend. Cheers, Mike - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] screen colors invert with matplotlib
Thanks John. I did this test: python simple_plot.py -dTkAgg and it worked just fine. (The GTK backend won't compile for me, but that is a topic for another email.) So you are correct, it seems to be a qt4 problem or a pyqt4 problem, I guess. At least I know where to look now. -Dan -Original Message- From: John Hunter [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 09, 2008 11:40 AM To: Dan Karipides Cc: Matplotlib Users Subject: Re: [Matplotlib-users] screen colors invert with matplotlib On Jan 9, 2008 10:14 AM, Dan Karipides [EMAIL PROTECTED] wrote: OS: Fedora Core 8 Video Card: Nvidia GeForce 8800 Ultra Driver: Latest Unix driver from Nvidia (169.07, release date: Dec 20, 2007) Matplotlib version: matplotlib-0.91.2.tar.gz (built from source) Backend chosen: qt4agg Hi Dan, No one has ever reported anything like this before as far as I know. Could you try running a simple test script with a different GUI backend, eg tkagg or gtkagg python simple_plot.py -dTkAgg #or GTKAgg I assume this is a qt4 problem, but I'd just like to confirm before we proceed. Do you see it with qtagg or just qt4agg? - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] screen colors invert with matplotlib
On Jan 9, 2008 1:32 PM, Dan Karipides [EMAIL PROTECTED] wrote: Thanks John. I did this test: python simple_plot.py -dTkAgg and it worked just fine. (The GTK backend won't compile for me, but that is a topic for another email.) So you are correct, it seems to be a qt4 problem or a pyqt4 problem, I guess. At least I know where to look now. What about qtagg vs qt4agg? It would be interesting to know if it is qt4 specific, or qt specific. Please keep the responses on list because there are other developers more knowledgeable than I about qt. JDH - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] screen colors invert with matplotlib
I wonder if the problem exhibits itself in any other pyqt4 apps (such as the demo apps)... In that case, I would take your question to the pyqt list. Otherwise, we'll want to track down what specifically matplotlib is doing that causes this. Cheers, Mike Dan Karipides wrote: Thanks John. I did this test: python simple_plot.py -dTkAgg and it worked just fine. (The GTK backend won't compile for me, but that is a topic for another email.) So you are correct, it seems to be a qt4 problem or a pyqt4 problem, I guess. At least I know where to look now. -Dan -Original Message- From: John Hunter [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 09, 2008 11:40 AM To: Dan Karipides Cc: Matplotlib Users Subject: Re: [Matplotlib-users] screen colors invert with matplotlib On Jan 9, 2008 10:14 AM, Dan Karipides [EMAIL PROTECTED] wrote: OS: Fedora Core 8 Video Card: Nvidia GeForce 8800 Ultra Driver: Latest Unix driver from Nvidia (169.07, release date: Dec 20, 2007) Matplotlib version: matplotlib-0.91.2.tar.gz (built from source) Backend chosen: qt4agg Hi Dan, No one has ever reported anything like this before as far as I know. Could you try running a simple test script with a different GUI backend, eg tkagg or gtkagg python simple_plot.py -dTkAgg #or GTKAgg I assume this is a qt4 problem, but I'd just like to confirm before we proceed. Do you see it with qtagg or just qt4agg? - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] screen colors invert with matplotlib
I don't have pyqt installed, just pyqt4, so I'm afraid I can't do that test for you at the moment. Though I suppose I could install pyqt as one method of testing this. Thanks, -Dan -Original Message- From: John Hunter [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 09, 2008 2:32 PM To: Dan Karipides; Matplotlib Users Subject: Re: [Matplotlib-users] screen colors invert with matplotlib On Jan 9, 2008 1:32 PM, Dan Karipides [EMAIL PROTECTED] wrote: Thanks John. I did this test: python simple_plot.py -dTkAgg and it worked just fine. (The GTK backend won't compile for me, but that is a topic for another email.) So you are correct, it seems to be a qt4 problem or a pyqt4 problem, I guess. At least I know where to look now. What about qtagg vs qt4agg? It would be interesting to know if it is qt4 specific, or qt specific. Please keep the responses on list because there are other developers more knowledgeable than I about qt. JDH - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] screen colors invert with matplotlib
Do the demo apps come with the standard qt4/pyqt4 install? I just used the Fedora Core 8 package manager to install both of these packages. I apologize that my knowledge of qt is limited. I'll do some investigation of qt4 / pyqt4 on my own before bothering the list further. Thanks for the suggestion, -Dan -Original Message- From: Michael Droettboom [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 09, 2008 2:35 PM To: Dan Karipides Cc: 'Matplotlib Users' Subject: Re: [Matplotlib-users] screen colors invert with matplotlib I wonder if the problem exhibits itself in any other pyqt4 apps (such as the demo apps)... In that case, I would take your question to the pyqt list. Otherwise, we'll want to track down what specifically matplotlib is doing that causes this. Cheers, Mike Dan Karipides wrote: Thanks John. I did this test: python simple_plot.py -dTkAgg and it worked just fine. (The GTK backend won't compile for me, but that is a topic for another email.) So you are correct, it seems to be a qt4 problem or a pyqt4 problem, I guess. At least I know where to look now. -Dan -Original Message- From: John Hunter [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 09, 2008 11:40 AM To: Dan Karipides Cc: Matplotlib Users Subject: Re: [Matplotlib-users] screen colors invert with matplotlib On Jan 9, 2008 10:14 AM, Dan Karipides [EMAIL PROTECTED] wrote: OS: Fedora Core 8 Video Card: Nvidia GeForce 8800 Ultra Driver: Latest Unix driver from Nvidia (169.07, release date: Dec 20, 2007) Matplotlib version: matplotlib-0.91.2.tar.gz (built from source) Backend chosen: qt4agg Hi Dan, No one has ever reported anything like this before as far as I know. Could you try running a simple test script with a different GUI backend, eg tkagg or gtkagg python simple_plot.py -dTkAgg #or GTKAgg I assume this is a qt4 problem, but I'd just like to confirm before we proceed. Do you see it with qtagg or just qt4agg? - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] screen colors invert with matplotlib
Could you please post a screenshot of the bad behavior? I don't see anything strange here, and I'm using qt-4.3.3, pyqt-4.3.3, and an nvidia GeForce 6600. Darren On Wednesday 09 January 2008 05:00:28 pm Dan Karipides wrote: Do the demo apps come with the standard qt4/pyqt4 install? I just used the Fedora Core 8 package manager to install both of these packages. I apologize that my knowledge of qt is limited. I'll do some investigation of qt4 / pyqt4 on my own before bothering the list further. Thanks for the suggestion, -Dan -Original Message- From: Michael Droettboom [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 09, 2008 2:35 PM To: Dan Karipides Cc: 'Matplotlib Users' Subject: Re: [Matplotlib-users] screen colors invert with matplotlib I wonder if the problem exhibits itself in any other pyqt4 apps (such as the demo apps)... In that case, I would take your question to the pyqt list. Otherwise, we'll want to track down what specifically matplotlib is doing that causes this. Cheers, Mike Dan Karipides wrote: Thanks John. I did this test: python simple_plot.py -dTkAgg and it worked just fine. (The GTK backend won't compile for me, but that is a topic for another email.) So you are correct, it seems to be a qt4 problem or a pyqt4 problem, I guess. At least I know where to look now. -Dan -Original Message- From: John Hunter [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 09, 2008 11:40 AM To: Dan Karipides Cc: Matplotlib Users Subject: Re: [Matplotlib-users] screen colors invert with matplotlib On Jan 9, 2008 10:14 AM, Dan Karipides [EMAIL PROTECTED] wrote: OS: Fedora Core 8 Video Card: Nvidia GeForce 8800 Ultra Driver: Latest Unix driver from Nvidia (169.07, release date: Dec 20, 2007) Matplotlib version: matplotlib-0.91.2.tar.gz (built from source) Backend chosen: qt4agg Hi Dan, No one has ever reported anything like this before as far as I know. Could you try running a simple test script with a different GUI backend, eg tkagg or gtkagg python simple_plot.py -dTkAgg #or GTKAgg I assume this is a qt4 problem, but I'd just like to confirm before we proceed. Do you see it with qtagg or just qt4agg? - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplac e ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Darren S. Dale, Ph.D. Staff Scientist Cornell High Energy Synchrotron Source Cornell University 275 Wilson Lab Rt. 366 Pine Tree Road Ithaca, NY 14853 [EMAIL PROTECTED] office: (607) 255-3819 fax: (607) 255-9001 http://www.chess.cornell.edu - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] screen colors invert with matplotlib
Darren, This is interesting. I tried to get a screenshot of the bad behavior for you. My first attempt was to just hit print screen. Under Fedora Core 8, KDE window manager this brings up the application KSnapshot. When KSnapshot gets focus, the bad behavior goes away and it was not captured in the screenshot. I did notice the KSnapshot app has a snapshot delay feature. I set it to 2 seconds, and clicked new snapshot. The KSnapshot window disappeared for 2 seconds; the bad behavior was back for that period of time. However, even in this case, the behavior doesn't show up in the screenshot. This makes me wonder if maybe it is a video driver problem. Linux has the right colors in memory (which is I assume the level at which the snap shot is taken), but the driver is wigging out when communicating the info to the actual video card. If I manage to get a SS I will post it. -Dan -Original Message- From: Darren Dale [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 09, 2008 3:08 PM To: matplotlib-users@lists.sourceforge.net Cc: Dan Karipides Subject: Re: [Matplotlib-users] screen colors invert with matplotlib Could you please post a screenshot of the bad behavior? I don't see anything strange here, and I'm using qt-4.3.3, pyqt-4.3.3, and an nvidia GeForce 6600. Darren On Wednesday 09 January 2008 05:00:28 pm Dan Karipides wrote: Do the demo apps come with the standard qt4/pyqt4 install? I just used the Fedora Core 8 package manager to install both of these packages. I apologize that my knowledge of qt is limited. I'll do some investigation of qt4 / pyqt4 on my own before bothering the list further. Thanks for the suggestion, -Dan -Original Message- From: Michael Droettboom [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 09, 2008 2:35 PM To: Dan Karipides Cc: 'Matplotlib Users' Subject: Re: [Matplotlib-users] screen colors invert with matplotlib I wonder if the problem exhibits itself in any other pyqt4 apps (such as the demo apps)... In that case, I would take your question to the pyqt list. Otherwise, we'll want to track down what specifically matplotlib is doing that causes this. Cheers, Mike - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Can't run matplotlib without tk backend on windows?
On Jan 9, 2008 10:35 AM, Darren Dale [EMAIL PROTECTED] wrote: On Wednesday 09 January 2008 10:15:54 am Francesco Pretto wrote: 2008/1/9, Darren Dale [EMAIL PROTECTED]: setup.py attempts to select the appropriate backend for you, based on what backends were available at build time. That selection is written into the default matplotlibrc file, which resides in site-packages/matplotlib/mpl-data. If matplotlib finds another matplotlibrc file (for example, in the current working directory, in $HOME/.matplotlib, etc), then it will use those settings instead. I would guess that is the source of the problem. No, the problem is the default installed matplotlibrc, that is not different from the one present in the source tree and has the default selection: backend : TkAgg Now, i don't know if the build script is trying to modify it according user selection or compile-time backend detection, but I'm wondering why the same problem wasn't happening on linux, where I tipically never install Tk runtime. However, for me the problem is solved, but if there's a matplotlib windows dev listening, here is my experience; first, i removed the already installed lib/site-packages/matplotlib/mpl-data/matplotlibrc . Afer, I went for clean compiling with a setup.cfg with these configurations: gtk = True gtkagg = False tkagg = False wxagg = False backend = GTK Eventually, python setup.py install write again a site-packages/matplotlib/mpl-data/matplotlibrc which still have: backend : TkAgg If this shouldn't happen, well, consider this a bug report :D Oh, I see. Look at line 238 in setup.py. Maybe we don't need that check for sys.platform anymore, now that we have setup.cfg. I think that check was in there for the benefit of building the windows installers, which we wanted to default to tkagg. I think it would be best to use a setup.cfg to set the numerix and backends when building the windows installers. Charlie, does that sound alright? That's fine. I didn't use setup.cfg for the latest binaries though. - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] Can't run matplotlib without tk backend on windows?
On Wednesday 09 January 2008 8:50:46 pm Charlie Moad wrote: On Jan 9, 2008 10:35 AM, Darren Dale [EMAIL PROTECTED] wrote: On Wednesday 09 January 2008 10:15:54 am Francesco Pretto wrote: 2008/1/9, Darren Dale [EMAIL PROTECTED]: setup.py attempts to select the appropriate backend for you, based on what backends were available at build time. That selection is written into the default matplotlibrc file, which resides in site-packages/matplotlib/mpl-data. If matplotlib finds another matplotlibrc file (for example, in the current working directory, in $HOME/.matplotlib, etc), then it will use those settings instead. I would guess that is the source of the problem. No, the problem is the default installed matplotlibrc, that is not different from the one present in the source tree and has the default selection: backend : TkAgg Now, i don't know if the build script is trying to modify it according user selection or compile-time backend detection, but I'm wondering why the same problem wasn't happening on linux, where I tipically never install Tk runtime. However, for me the problem is solved, but if there's a matplotlib windows dev listening, here is my experience; first, i removed the already installed lib/site-packages/matplotlib/mpl-data/matplotlibrc . Afer, I went for clean compiling with a setup.cfg with these configurations: gtk = True gtkagg = False tkagg = False wxagg = False backend = GTK Eventually, python setup.py install write again a site-packages/matplotlib/mpl-data/matplotlibrc which still have: backend : TkAgg If this shouldn't happen, well, consider this a bug report :D Oh, I see. Look at line 238 in setup.py. Maybe we don't need that check for sys.platform anymore, now that we have setup.cfg. I think that check was in there for the benefit of building the windows installers, which we wanted to default to tkagg. I think it would be best to use a setup.cfg to set the numerix and backends when building the windows installers. Charlie, does that sound alright? That's fine. I didn't use setup.cfg for the latest binaries though. That is no problem. If you had, the binaries would not be any different than they are now. I'll make the change tomorrow, and send you the appropriate setup.cfg for building the windows installer. Darren - Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
