matplotlib-users Mailing List for matplotlib

Steve Lianoglou
<lis...@ar...> writes:
> Trying to import pylab from the shell gives me a Bus Error.
 [...]
> Anybody have any ideas on what to do from here?
Follow the instructions in the SEGFAULTS file, which begins as follows:
| First thing to try is simply rm -rf the site-packages/matplotlib and
| build subdirs and get a clean install. Installing a new version over
| a pretty old version has been known to cause trouble, segfault, etc.
-- 
Jouni K. Seppänen
http://www.iki.fi/jks

Hi all,
I just upgraded to the latest svn for matlotlib and she's blowing up 
on me with this error:
terminate called after throwing an instance of 'std::bad_cast'
 what(): St8bad_cast
Abort trap
It happens when I fire up ipython w/ -pylab ... (and some other non 
specified code in one of my project's code base if I fire up python 
as is and import that -- helpful, right?)
Trying to import pylab from the shell gives me a Bus Error.
I'm running on OS X 10.4.10 (intel) with pretty much everything 
compiled from macports (using the GTKAgg backend):
 * python2.4.4
 * gtk2 @2.10.13_0
 * antigraingeometry @2.5_0
 * ... so many other packages ..
I'm trying to see if there are any outdated ports that might be 
necessary to upgrade, but at a glance, nothing is jumping out at me 
(I also just upgraded the gtk2 and agg -- so I'm assuming all of 
their dependencies were upgraded as well).
Anybody have any ideas on what to do from here?
Thanks,
-steve

On Jul 26, 2007, at Jul 26:4:49 PM, Jouni K. Sepp=E4nen wrote:
> Brian Blais <bb...@br...> writes:
>
>> and it works with pylab. But, if I use matplotlib.Figure directly in
>> an app, and then call:
>> myfig.savefig('blah.pdf') it saves it as 'blah.pdf.jpg', a jpeg =20
>> file.
>
> Sounds like you are using a backend other than the pdf one. Can you
> write up a complete example of code that behaves like you describe?
>
This is the smallest example I can write. I am embedding the figure =20
in a wx window. In this test case, I print (successfully) a PNG and =20
EPS, but the PDF doesn't work (gets a .jpg attached to the end).
			bb
--=20
Brian Blais
bb...@br...
http://web.bryant.edu/~bblais
#!/usr/bin/env python
import wx
from matplotlib.backends.backend_wxagg import FigureCanvasWx as =20
FigureCanvas
from matplotlib.figure import Figure
class MainWindow(wx.Frame):
 """ We simply derive a new class of Frame. """
 def __init__(self, parent, id, title):
 wx.Frame.__init__(self, parent, id, title, size=3D(400,400))
 fig =3D Figure()
 canvas =3D FigureCanvas(self,-1, fig)
 ax=3Dfig.add_subplot(111)
 ax.plot([1,2,3,4],'o')
 canvas.draw()
 self.Show(True)
 fig.savefig('blah.eps')
 fig.savefig('blah.png')
 fig.savefig('blah.pdf')
app =3D wx.PySimpleApp()
frame=3DMainWindow(None, wx.ID_ANY, 'Test')
app.MainLoop()