[Matplotlib-users] matplotlib-0.87.7 Build Failure

[Rich Shepard]

>From 'python setup.py build':

src/_ns_backend_gdk.c:17:25: pygtk/pygtk.h: No such file or directory

   However, ...

[EMAIL PROTECTED] ~]$ locate pygtk.h
/usr/local/pygtk-2.8.6/gtk/pygtk.h
/usr/local/include/pygtk-2.0/pygtk/pygtk.h

   Do I need to add /usr/local/include/pygtk-2.0/ somewhere in setup.py?

Thanks,

Rich

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Re: [Matplotlib-users] clearing a figure

[Eric Firing]

John Hunter wrote:
>> "Christopher" == Christopher Barker <[EMAIL PROTECTED]> writes:
> 
> Christopher> However, it is the case that there is a lot of stuff
> Christopher> in pylab that makes it easier to use MPL in
> Christopher> interactive mode. I kind of think that's a shame. I
> Christopher> don't think that there is any reason that an OO
> Christopher> interface is less suited to interactive mode.
> 
> It's currently implemented in pylab but could be moved up to the OO
> layer by doing something like
> 
> class Axes:
>def plot(self, *args, **kwargs):
>...plot something
>if rcParams['interactive']:
> self.figure.canvas.draw()

I think this may be a slippery slope.  The problem is that for it to 
work well, there has to be a clear distinction between methods that are 
endpoints, requiring a redraw, and methods that will be used by other 
methods.  For example, errorbar makes multiple calls to plot, vline, 
etc.  Even in interactive mode, we don't want redraws after each of 
those calls, only after the errorbar call itself.  This could be handled 
by including an additional kwarg ("redraw=False"), or by requiring that 
methods like errorbar use only lower-level primitives, but either way, 
complexity increases.

Eric

> 
> or by providing some autowrapper facility to automate this.  Probably
> could be done elegantly with decorators, but we can't use decorators
> yet...
> 
> Or OO users can just call fig.canvas.draw() themselves when they want
> to draw
> 
> JDH
> 


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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[Robert Kern]

belinda thom wrote:
> Hi,
> 
> On Jan 10, 2007, at 5:56 PM, Robert Kern wrote:
> 
>> belinda thom wrote:
>>> I went back and retried the plotting w/wx
>>> as a backend and discovered that wx FAILS with PYTHONW and PYTHON
>>> (appended).
>> Okay, what version of wxPython did you install? What version of  
>> wxPython is
>> actually imported (check wx.__version__)?
> 
> Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
> [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> history mechanism set up
>  >>> import wx
>  >>> wx.__version__
> '2.6.3.3'

Okay, let me rephrase: which binary package of wxPython did you install?

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco


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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[belinda thom]

Hi,

On Jan 10, 2007, at 5:56 PM, Robert Kern wrote:

> belinda thom wrote:
>> I went back and retried the plotting w/wx
>> as a backend and discovered that wx FAILS with PYTHONW and PYTHON
>> (appended).
>
> Okay, what version of wxPython did you install? What version of  
> wxPython is
> actually imported (check wx.__version__)?

Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
history mechanism set up
 >>> import wx
 >>> wx.__version__
'2.6.3.3'

> (And we can leave off numpy-discussion, it's not relevant there).
>
> -- 
> Robert Kern

Thanks,
--b

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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[Robert Kern]

belinda thom wrote:
> I went back and retried the plotting w/wx  
> as a backend and discovered that wx FAILS with PYTHONW and PYTHON  
> (appended).

Okay, what version of wxPython did you install? What version of wxPython is
actually imported (check wx.__version__)?

(And we can leave off numpy-discussion, it's not relevant there).

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco


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Re: [Matplotlib-users] clearing a figure

[belinda thom]

On Jan 10, 2007, at 4:57 PM, Eric Firing wrote:

> Christopher Barker wrote:
>> Eric Firing wrote:
>>> This is the big difference between most pylab functions and the
>>> corresponding axes or figure methods that they wrap: the pylab
>>> functions automatically take care of redrawing the figure if you are
>>> in an interactive mode.
>>
>> Now I feel bad -- I think I encouraged Belinda to work with the OO
>> interface, because I think it's the better way to go, and, in
>> particular, translates better to putting MPL code in larger programs.

Don't feel bad. The online community is great, and I've appreciated  
all the advise I've gotten.

>> However, it is the case that there is a lot of stuff in pylab that  
>> makes
>> it easier to use MPL in interactive mode. I kind of think that's a
>> shame. I don't think that there is any reason that an OO interface is
>> less suited to interactive mode.
>
> Even without the automatic-redraw difference, the OO interface  
> requires
> more typing, and more mental record-keeping, than the pylab interface.
> Typing "plot(x,y)" is easier to do and remember than creating a  
> figure,
> adding axes, and then typing "ax1.plot(x,y)".  For interactive use, I
> really don't see any advantage to an OO interface.  What advantage do
> you see?

In my case, the advantage of pylab over OO is its simplicity. If this  
simpler usage wasn't available, it would be much harder to teach  
Matlab-like stuff in introductory programming classes via Python.

At the same time, it is very easy to confuse the difference between  
the Matlab-like stuff, the OO-like stuff, and then there's also numpy.

I vote for better documentation regarding these pieces, their  
interactions and their differences, somewhere easy-to-find online.

--b




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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[belinda thom]

Hi Chris, Robert, ...?,

I'm glad you reminded me to make sure the path was right, b/c this  
time, I had forgotten to run the "Update Shell" command that came w/ 
MacPython2.4. This gave me:

lrwxr-xr-x 1 root wheel 67 Jan 7 14:29 /usr/local/bin/pydoc@ - 
 > ../../../Library/Frameworks/Python.framework/Versions/2.4/bin/pydoc
lrwxr-xr-x 1 root wheel 70 Jan 7 14:29 /usr/local/bin/pydoc2.4@ - 
 > ../../../Library/Frameworks/Python.framework/Versions/2.4/bin/ 
pydoc2.4
lrwxr-xr-x 1 root wheel 68 Jan 7 14:29 /usr/local/bin/python@ - 
 > ../../../Library/Frameworks/Python.framework/Versions/2.4/bin/python
lrwxr-xr-x 1 root wheel 71 Jan 7 14:29 /usr/local/bin/python2.4@ - 
 > ../../../Library/Frameworks/Python.framework/Versions/2.4/bin/ 
python2.4
lrwxr-xr-x 1 root wheel 69 Jan 7 14:29 /usr/local/bin/pythonw@ - 
 > ../../../Library/Frameworks/Python.framework/Versions/2.4/bin/pythonw
lrwxr-xr-x 1 root wheel 72 Jan 7 14:29 /usr/local/bin/pythonw2.4@ - 
 > ../../../Library/Frameworks/Python.framework/Versions/2.4/bin/ 
pythonw2.4
lrwxr-xr-x 1 root wheel 70 Jan 7 14:29 /usr/local/bin/smtpd.py@ - 
 > ../../../Library/Frameworks/Python.framework/Versions/2.4/bin/ 
smtpd.py
lrwxr-xr-x 1 root wheel 73 Jan 7 14:29 /usr/local/bin/smtpd2.4.py@ - 
 > ../../../Library/Frameworks/Python.framework/Versions/2.4/bin/ 
smtpd2.4.py

Nevertheless, the python I was using in the prior email looks like  
the same as what I'm using w/these path updates, that is, assuming  
version strings are enough to know:

   From prior run:
   Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
   [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin

   New run:
   Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
   [GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin

As you'd suspected, it is indeed the case that:

diff pythonw python

reports no differences. So, I went back and retried the plotting w/wx  
as a backend and discovered that wx FAILS with PYTHONW and PYTHON  
(appended).

If you saw how many notes I've collected on the different installs  
I've tried you'd laugh (except that its not funny). Its no wonder I  
can't keep all this stuff straight. (When I first embarked on this  
exercise several months ago, I tried macports; everything seemed to  
work fine, but the Wx backend failed---I remember something about a  
bitmap, so it was likely the same error I'm having now; and  
unfortunately w/the macports python, the tk/tcl stuff didn't come  
wrapped, so TkAgg was not an option).

After an email w/Robert, I switched to MacPython. As a result, I now  
have TkAgg working (and its using Aqua instead of that awful, klunky  
looking Tk stuff).

Fortunately (ha!), I have three versions of this stuff installed on 3  
different Macs (a G4, a G5, and an Intel). So I can say with safety  
that, using TkAgg backend, here's what's still not working:

1) Using macpython matplotlib, numpy, and scipy packages, you can't  
run scipy.test(); complaint: RuntimeError: module compiled against  
version 102 of C-API but this version of numpy is 109
2) Using superpak, everything (except ipython) worked out of the box,  
PROVIDED I had already installed the necessary fortran pieces (I used  
g77v3.4-bin.tar.gz, found somewhere on the scipy site).
3) Using Robert's install-from-source method (this install used  
gfortran.bin.tar.gz, with the caveat that the expected WXAgg doesn't  
work)

Machines 2 and 3 are enough to get me back to the real work I have to  
do. But it is obvious there's several real issues for Mac users who  
wish to use the scipy/numpy/matplotlib route. This coming summer I  
may have more time to devote to this stuff, and since it really irks  
me that there isn't a clean way to do this, I may end up figuring out  
how to make the needed binaries myself. In the meantime, I thought  
I'd never wish I was still using Windows...

Thanks to everyone for the time spent on this. And for posterity's  
sake, when you use matplotlib with Numeric, it also crashes. I've  
verified that behavior on Machines 1 and 2 above.

--b

54 % pythonw
Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
history mechanism set up
 >>> import pylab as P
 >>> import matplotlib as M
 >>> M.rcParams['interactive']
True
 >>> M.rcParams['backend']
'WXAgg'
 >>> P.plot([1,2,3])
Traceback (most recent call last):
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ 
site-packages/matplotlib/backends/backend_wx.py", line 1048, in _onPaint
self.draw(repaint=False)

draw_if_interactive()
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ 
site-packages/matplotlib/backends/backend_wx.py", line 1172, in  
draw_if_interactive
figManager.canvas.draw()
File "/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/ 
site-packages/matplotlib/backends/backend_wxagg.py", line 63, in draw
self.bitmap = _convert_agg_to_wx_bit

Re: [Matplotlib-users] clearing a figure

[Eric Firing]

Christopher Barker wrote:
> Eric Firing wrote:
>> This is the big difference between most pylab functions and the 
>> corresponding axes or figure methods that they wrap: the pylab 
>> functions automatically take care of redrawing the figure if you are 
>> in an interactive mode.
> 
> Now I feel bad -- I think I encouraged Belinda to work with the OO 
> interface, because I think it's the better way to go, and, in 
> particular, translates better to putting MPL code in larger programs.
> 
> However, it is the case that there is a lot of stuff in pylab that makes 
> it easier to use MPL in interactive mode. I kind of think that's a 
> shame. I don't think that there is any reason that an OO interface is 
> less suited to interactive mode.

Even without the automatic-redraw difference, the OO interface requires 
more typing, and more mental record-keeping, than the pylab interface.
Typing "plot(x,y)" is easier to do and remember than creating a figure, 
adding axes, and then typing "ax1.plot(x,y)".  For interactive use, I 
really don't see any advantage to an OO interface.  What advantage do 
you see?

Eric

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Re: [Matplotlib-users] clearing a figure

[Christopher Barker]

John Hunter wrote:
> It's currently implemented in pylab but could be moved up to the OO
> layer by doing something like
> 
> class Axes:
>def plot(self, *args, **kwargs):
>...plot something
>if rcParams['interactive']:
> self.figure.canvas.draw()
> 
> or by providing some autowrapper facility to automate this.

That could work -- and/or subclass the key classes, and wrap their plot, 
etc. methods. hmmm..

> Or OO users can just call fig.canvas.draw() themselves when they want
> to draw

Well, yes, but the point I'm making is that it should be just as easy to 
use interactively -- that's a bit too much code to want to type at the 
command line.

-Chris


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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[Christopher Barker]

Robert Kern wrote:

> Try running with pythonw.

That's probably not it -- as of MacPython 2.4, pythonw ands python are 
the same.

belinda thom wrote:
> And running w/pythonw does what it should :-).

OK, now I'm confused:

$ ls -l /Library/Frameworks/Python.framework/Versions/2.4/bin/python2.4
-rwxrwxr-x   1 root  admin  39936 Apr  7  2006 
/Library/Frameworks/Python.framework/Versions/2.4/bin/python2.4

$ ls -l /Library/Frameworks/Python.framework/Versions/2.4/bin/pythonw2.4
-rwxrwxr-x   1 root  admin  39936 Apr  7  2006 
/Library/Frameworks/Python.framework/Versions/2.4/bin/pythonw2.4

Those two look like the same binaries to me -- and diff tells me they are.

Are you sure you're running the same python with "python" and "pythonw"? 
Try running them on the command line alone and see what you get.

>File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ 
> python2.4/site-packages/matplotlib/backends/backend_wxagg.py", line  
> 63, in draw
>  self.bitmap = _convert_agg_to_wx_bitmap(self.get_renderer(), None)
> MemoryError: _wxagg.convert_agg_to_wx_bitmap(): could not create the  
> wx.Bitmap

This looks like the error we usually get when you've built the wxAgg 
extension against a different version of wx than the one you're running. 
That's easy to do, as Apple has provided an old wx with it's Python, it 
is often found by default by the MPL build process.

Search this list for the way to fix that, or, if you really can't find 
it, I'll dig it up.

-Chris








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Re: [Matplotlib-users] clearing a figure

[John Hunter]

> "Christopher" == Christopher Barker <[EMAIL PROTECTED]> writes:

Christopher> However, it is the case that there is a lot of stuff
Christopher> in pylab that makes it easier to use MPL in
Christopher> interactive mode. I kind of think that's a shame. I
Christopher> don't think that there is any reason that an OO
Christopher> interface is less suited to interactive mode.

It's currently implemented in pylab but could be moved up to the OO
layer by doing something like

class Axes:
   def plot(self, *args, **kwargs):
   ...plot something
   if rcParams['interactive']:
self.figure.canvas.draw()

or by providing some autowrapper facility to automate this.  Probably
could be done elegantly with decorators, but we can't use decorators
yet...

Or OO users can just call fig.canvas.draw() themselves when they want
to draw

JDH


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Re: [Matplotlib-users] clearing a figure

[Christopher Barker]

Eric Firing wrote:
> This is the big difference between most pylab functions and the 
> corresponding axes or figure methods that they wrap: the pylab functions 
> automatically take care of redrawing the figure if you are in an 
> interactive mode.

Now I feel bad -- I think I encouraged Belinda to work with the OO 
interface, because I think it's the better way to go, and, in 
particular, translates better to putting MPL code in larger programs.

However, it is the case that there is a lot of stuff in pylab that makes 
it easier to use MPL in interactive mode. I kind of think that's a 
shame. I don't think that there is any reason that an OO interface is 
less suited to interactive mode.

I've thought for a while that I'd love to write a "OOlab" module -- that 
is, an object oriented interface to matplotlib that is well suited to 
interactive use.

However,

1) who know when I'll get around to it, and I haven't yet because I 
hardly ever do much interactively anyway (I didn't with Matlab, either).

2) this is an example of how it's hard to do -- a method like 
Figure.Clear() clearly belongs just where it is in an OO framework. 
Would it be possible for all those OO drawing methods to be able to 
query an "interactive" property somewhere? Does it live only in pylab now?

-Chris


-- 
Christopher Barker, Ph.D.
Oceanographer

Emergency Response Division
NOAA/NOS/OR&R(206) 526-6959   voice
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Seattle, WA  98115   (206) 526-6317   main reception

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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[Robert Kern]

belinda thom wrote:
> Robert,
> 
>> Try running with pythonw.
> 
> Do you know how to fix this in IDLE (it must be using python as  
> opposed to pythonw somehow).

I'm afraid that I don't know enough about IDLE to help you.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco


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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[Robert Kern]

John Hunter wrote:
>> "Robert" == Robert Kern <[EMAIL PROTECTED]> writes:
> 
> Robert> Personally, I think the warnings are a bit overzealous and
> Robert> should be silenced.  It's not as if the user is explicitly
> Robert> telling the font manager to load those specific
> Robert> fonts. They are automatically and unavoidably attempted.
> 
> I just modified the font manager to move this reporting into the
> verbose handler, so now they will only show up with verbose "helpful"
> or greater.

And there was much rejoicing!

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco


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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[belinda thom]

Robert,

> Try running with pythonw.

Do you know how to fix this in IDLE (it must be using python as  
opposed to pythonw somehow).

Thanks again for all your help,

--b

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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[belinda thom]

Thanks.

And running w/pythonw does what it should :-).


On Jan 10, 2007, at 12:16 PM, John Hunter wrote:

>> "Robert" == Robert Kern <[EMAIL PROTECTED]> writes:
>
> Robert> Personally, I think the warnings are a bit overzealous and
> Robert> should be silenced.  It's not as if the user is explicitly
> Robert> telling the font manager to load those specific
> Robert> fonts. They are automatically and unavoidably attempted.
>
> I just modified the font manager to move this reporting into the
> verbose handler, so now they will only show up with verbose "helpful"
> or greater.
>
> JDH
>
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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[John Hunter]

> "Robert" == Robert Kern <[EMAIL PROTECTED]> writes:

Robert> Personally, I think the warnings are a bit overzealous and
Robert> should be silenced.  It's not as if the user is explicitly
Robert> telling the font manager to load those specific
Robert> fonts. They are automatically and unavoidably attempted.

I just modified the font manager to move this reporting into the
verbose handler, so now they will only show up with verbose "helpful"
or greater.

JDH

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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[Robert Kern]

belinda thom wrote:
> I am posting this message to both numpy and matplotlib mailing lists  
> because the thread relates to both.

Actually, it's really only relevant to matplotlib.

> However, after installing wx and matplotlib, various problems result:
> 
> 1) warnings about fonts
> 2) wx fails to work
> 
> I've appended the warnings below. These only occur the first time  
> pylab is imported (does this make sense?).

Yes. After the first time, a cache is built and the font manager doesn't go
trawling through your fonts again. matplotlib's font library cannot parse some
of the Mac fonts (damned resource forks), so it warns you.

Personally, I think the warnings are a bit overzealous and should be silenced.
It's not as if the user is explicitly telling the font manager to load those
specific fonts. They are automatically and unavoidably attempted.

> WX / MATPLOTLIB FAILURE
> --
> 
> 4 % python

Try running with pythonw.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
 that is made terrible by our own mad attempt to interpret it as though it had
 an underlying truth."
  -- Umberto Eco


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Re: [Matplotlib-users] installing numpy, matplotlib, scipy from source on a Mac

[belinda thom]

I am posting this message to both numpy and matplotlib mailing lists  
because the thread relates to both.

First, Robert Kern kindly provided step-by-step instructions for Macs  
(PPCs and Intels) regarding how to install FROM SOURCE the packages  
needed to allow Python to become a viable alternative for Matlab.  
Details regarding the installation of matplotlib (along with wx,  
which is supposed to allow the WxAgg backend to work), numpy, and  
scipy were provided.

The reason for installing FROM SOURCE on a Mac is because various  
packages need to be compiled in such a way that they rely on the same  
underling shared libraries, etc. for things to work (I've described  
some problems w/installing from numpy, scipy, and matplotlib dmgs at  
http://www.mail-archive.com/ numpy-discussion at scipy.org/ 
msg00481.html).

 From these instructions, I've been able to acheive numpy.test() anad  
scipy.test() that run w/no failures -- hooray!

However, after installing wx and matplotlib, various problems result:

1) warnings about fonts
2) wx fails to work

I've appended the warnings below. These only occur the first time  
pylab is imported (does this make sense?).

After that, I've appended the issues I've had when trying to use wx  
as a backend. One reason I'd like to be able to use wx is that it  
appears with TkAgg, running IDLE (w/the -n flag) can hang (see:  
http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/ 
msg02039.html).

Point that originally confused me: although wx is needed for the  
WxAgg backend, you don't need to install the analogous Tk package to  
use TkAgg PROVIDED you're using MacPython, for that comes bundled w/ 
an Aqua-based Tk interface.

I'm on a G4 PPC, w/OS X 10.4.8, and using MacPython 2.4. Any idea  
what wx doesn't work?

Thanks,

--b

ONE-TIME WARNINGS:

Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
history mechanism set up
 >>> import pylab as P
/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site- 
packages/matplotlib/font_manager.py:455: UserWarning: Could not open  
font file /Library/Fonts/NISC18030.ttf
   warnings.warn("Could not open font file %s"%fpath)

/Library/Frameworks/Python.framework/Versions/2.4/lib/python2.4/site- 
packages/matplotlib/font_manager.py:455: UserWarning: Could not open  
font file /System/Library/Fonts/TimesLTMM
   warnings.warn("Could not open font file %s"%fpath)
 >>>

WX / MATPLOTLIB FAILURE
--

4 % python
Python 2.4.4 (#1, Oct 18 2006, 10:34:39)
[GCC 4.0.1 (Apple Computer, Inc. build 5341)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
history mechanism set up
 >>> import matplotlib as M
 >>> import pylab as P
 >>> M.rcParams['interactive']
True
 >>> M.rcParams['backend']
'WXAgg'
 >>> P.plot([1,2,3])
Traceback (most recent call last):
   File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ 
python2.4/site-packages/matplotlib/backends/backend_wx.py", line  
1048, in _onPaint
 self.draw(repaint=False)

 figManager.canvas.draw()
   File "/Library/Frameworks/Python.framework/Versions/2.4/lib/ 
python2.4/site-packages/matplotlib/backends/backend_wxagg.py", line  
63, in draw
 self.bitmap = _convert_agg_to_wx_bitmap(self.get_renderer(), None)
MemoryError: _wxagg.convert_agg_to_wx_bitmap(): could not create the  
wx.Bitmap
 >>>


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Re: [Matplotlib-users] idle and ipython and axis

[John Hunter]

> "belinda" == belinda thom <[EMAIL PROTECTED]> writes:

belinda> I am not sure, but I think this difference in behavior is
belinda> b/c IPython is a bit better about calling
belinda> draw_if_interactive after "most pylab functions" (see
belinda> Eric Firing's http://www.mail-archive.com/matplotlib-
belinda> [EMAIL PROTECTED]/msg02037.html) than IDLE is.

No, this isn't it.  pylab does the draw_if_interactive call, and it is
called by pylab.axis:

def axis(*args, **kwargs):
ax = gca()
v = ax.axis(*v, **kwargs)
draw_if_interactive()
return v

I noticed in your subsequent post that interactive is set to True in
your rc file.  Make sure you are not running from the matplotlib
install directory or it will pick up your directory specific
matplotlib rc file.

You might want to do

  >>> from matplotlib import rcParams
  >>> print rcParams['interactive']

from within your IDLE session to verify.  Does interactive updating
work with other pylab commands.  I would be very surprised if just
'axis' were failing.

JDH


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Re: [Matplotlib-users] idle and ipython and axis

[belinda thom]

Mark,

> BTW, when you use pylab in interactive mode, the axis() command  
> should scale your figure interactively, also under IDLE. Have you  
> tried that?

Yes, I tried using axis in both IDLE and IPython. IPython's redrew  
the axis automatically whereas IDLE's did not.

I am not sure, but I think this difference in behavior is b/c IPython  
is a bit better about calling draw_if_interactive after "most pylab  
functions" (see Eric Firing's http://www.mail-archive.com/matplotlib- 
[EMAIL PROTECTED]/msg02037.html) than IDLE is.

> I have experienced the same problem with IDLE.
> It only works with -n, but then you lose the nice feature of  
> 'starting over'.
> Does anybody know a fix so we can do both?

I too would LOVE to have the ability to start over as IDLE w/o the -n  
allows. Unfortunately for me (on a Mac) I've not yet been unable to  
use WxAgg w/matplotlib using Mac-available packages. I might be able  
to use it after I'm done following http://projects.scipy.org/ 
pipermail/numpy-discussion/2007-January/025368.html, but I'm in  
crunch-mode at the moment, so that install is going slowly.

--b

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Re: [Matplotlib-users] idle and ipython and axis

[John Hunter]

> "belinda" == belinda thom <[EMAIL PROTECTED]> writes:

belinda> Hi,

belinda> I've been playing w/both IDLE and IPython, using TkAgg in
belinda> both cases as the back end. Also, I've got the latest
belinda> matplotlib and ipython versions and am using MacPython's
belinda> 2.4.4 IDLE.

belinda> It seems that if IDLE is not invoked w/the -n flag, the
belinda> figures that are drawn can often get the "whirling swirl
belinda> of death" (i.e. they hang). Has it been other users'
belinda> experience that the "-n" removes that problem (it
belinda> mentioned this flag in the manual, but I didn't catch he
belinda> motivation)? And if so, is there no other way to use IDLE
belinda> when using matplotlib interactively? (The nice thing
belinda> about IDLE is its "fresh" state each time you run a file;
belinda> this goes away when -n is used).

>From http://matplotlib.sourceforge.net/backends.html#TkAgg

Tkinter GUI backend

Todd Miller has written a backend for Tkinter that uses the agg
backend for rendering. To use Tkagg, you need to set the BUILD_TKAGG
flag in setup.py. The windows installer comes with TkAgg prebuilt. See
agg backend for more information on agg rendering and fonts. NOTE: on
at least some versions of redhat linux, you must install a separate
tkinter package, apparently tkinter-2.2.2-26.i386.rpm on Red Hat 9
linux. Alternately, Python built from source code (Python.org tarball,
not the redhat SRPM) includes Tkinter support by default on Red Hat
Linux. In general, TkAgg is known to work with

* python
* idle -n (set tk.PYTHONINSPECT : True in matplotlibrc
* IPython

TkAgg is known not work with:

* SciTE
* pythonw
* Pythonwin
* idle

Both of the latter shells fail with a RuntimeError "abnormal program
termination". I checked on www.python.org about Tkinter and Pythonwin
and they're known not to work together so that explains TkAgg on
Pythonwin. tkinter trouble.

I also looked into SciTE a little and discovered that it is related to
Scintilla which in turn was derived from Pythonwin. scintilla This
indicates to me that the same problem with Tkinter may be affecting
both (SciTE and Pythonwin)... but I am out on a limb.


So yes, -n  is required.  There were lots of discussions of this on
the mailing list years ago when tkagg was being developed, so if you
are interested you might try searching the archives.

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Re: [Matplotlib-users] idle and ipython and axis

[John Hunter]

> "belinda" == belinda thom <[EMAIL PROTECTED]> writes:

belinda> I can create plots to my hearts content in both, but when
belinda> I ask to rescale the plots, e.g. axis([-.2,2.4,-2,2.4]),
belinda> NOTHING happens to the figure drawn via IDLE, whereas the
belinda> command works as expected in IPython.

Are you running matplotlib in idle in "interactive" mode, as described 

http://matplotlib.sourceforge.net/interactive.html

ipython in pylab mode automatically turns on interactive mode...

JDH

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Re: [Matplotlib-users] idle and ipython and axis

[Mark Bakker]

I have experienced the same problem with IDLE.
It only works with -n, but then you lose the nice feature of 'starting
over'.
Does anybody know a fix so we can do both?
Thanks,
Mark

BTW, when you use pylab in interactive mode, the axis() command should scale
your figure interactively, also under IDLE. Have you tried that?
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[Matplotlib-users] zoom in polar plots

[Nils Wagner]

Hi,

How can I use zoom for polar plots ?
I mean a circular cutout would be better than a rectangular cutout.

Nils

from scipy import *
from pylab import show, polar
def M(omega):
s = 1j*omega
return linalg.solve(s*identity(n)-A_0,A_1)*exp(-h_0*s)

A_0 = array(([0,1.],[-32,-2]))
A_1 = array(([0.8,-0.4],[0.16,0.0]))
n = A_0.shape[0]
omega = linspace(-50,50,400)
h_0 = 0.2
for o in omega:
w = linalg.eigvals(M(o))
ind = argsort(abs(w))
w = take(w,ind)
polar([angle(w[-1])],[abs(w[-1])],'b.')
show()


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Re: [Matplotlib-users] (sf)mathtext fonts + custom LaTeX preamble

[Randewijk, P-J <[EMAIL PROTECTED]>]

I also had a problem matching matplotlib's mathfonts with my Beamer
(http://latex-beamer.sourceforge.net) presentation's Helvetica (or
sans-serif) mathfonts.

As LaTeX does not support Helvetica Math unless you buy it from
Micropress, I was curious as to how Till Tantau managed to implement
sans-serif mathfonts in his beamer class.

After some hacking-and-slashing I've isolated the necessary LaTeX code
to generate "beamer compatible" sans-serif math fonts, see attached .tex
file:

The easiest way to "convert" your mpl installation to generate
sans-serif math fonts is to search for "\begin{document}" in your
backend_ps.py file and then to past the attached LaTeX code just above
it.

A more permanent solution to mpl, with Darren's approval, would be the
attached patches to backend_ps.py and texmanager.py

These patches also include the option to add to the default LaTeX
preamble used by texmanager.py & backend_ps.py, e.g.:

rcParams['latex.preamble']=r"""\usepackage{amsmath,amssymb}
\usepackage[afrikaans]{babel}
\usepackage[iso,english]{isodate}
\usepackage{numprint}
"""

Kind regards,

Peter-Jan Randewijk


> -Original Message-
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On 
> Behalf Of Lane Brooks
> Sent: 09 January 2007 19:56
> To: matplotlib-users@lists.sourceforge.net
> Subject: [Matplotlib-users] mathtext fonts
> 
> Is there a way to get latex to use Ariel font and not italic? 
>  If I use the \rm{} command I can get rid of italic, but it 
> is using a serif font and I cannot find any documentation on 
> how to change that font.
> 
> Thanks,
> 
> Lane Brooks
> 
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beamer_sfmath.tex
Description: beamer_sfmath.tex


texmanager.patch
Description: texmanager.patch


backend_ps.patch
Description: backend_ps.patch
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Re: [Matplotlib-users] idle and ipython and axis

[Giorgio Luciano]

I had the same problem about figures that freeze using IDLE and 
matplotlib but finally I manage to solve it with the help of Eric and 
also a bit of luck.
Instead of using TkAgg I use WxAgg and it never hangs.
I use Idle -n and in the matplotlibrc  set Interactive
I use all latest version of Numpy, scipy, matplotlib and 
wxPython2.8-win32-unicode-2.8.0.1-py25

Hope this will help

Giorgio




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Re: [Matplotlib-users] clearing a figure

[Mark Bakker]

Belinda -

The hold state is on by default when you use pylab. To clear a figure you
use clf().
Here's a brief example:
from pylab import *
figure() # Not really needed, you could have typed plot right away, but here
you can set some nice features like the size
plot([1,2,3])
plot([2,1,2])  # Will appear on same figure
clf() # Clears entire figure (back to what you had with figure() )

Mark

Message: 10

Date: Tue, 09 Jan 2007 19:50:15 -0800
From: belinda thom <[EMAIL PROTECTED]>
Subject: [Matplotlib-users] clearing a figure
To: matplotlib-users 
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

Hello,

I'm a new matplotlib user, coming from the Matlab end.

Is there a standard way to create a figure (here I'd like the
equivalent of matlab's hold on, so I can draw multiple things) and
then clear the figure (so the drawing goes away) so I can repeat the
process again? The commands to plot that I'll be using are fairly
simple line commands.






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End of Matplotlib-users Digest, Vol 8, Issue 13
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