Eric:
First thanks for all the help. Here's the scoop after I replied to your
earlier post. I thought a bit about the sense of where you were going
(it always helps to think a bit). So I decided to try compiling
matplotlib with the GTK backend instead of Tk. I have gtk-2.11.5. So
I did some sed's to the setup.py file:
sed -i "s|BUILD_GTKAGG = 'auto'|BUILD_GTKAGG = 1|" setup.py &&
sed -i "s|BUILD_GTK = 'auto'|BUILD_GTK = 1|" setup.py &&
sed -i "s|BUILD_TKAGG = 'auto'|BUILD_TKAGG = 0|" setup.py &&
and then proceeded. It turned out that I needed pygtk, so I downloaded
that and installed it, but pygtk still complained about not having
pycairo (which it says is optional), so I downloaded that. Making a
long story short, installing pycairo-1.4.0, pyobject-2.14.0,
pygtk-2.10.6 and then reinstalling matplotlib with the above sed's did
the trick. I'm displaying all the plots I have been able to in XP (so I
don't need XP any more, at least at home).
Once again, thanks for the suggestions. Although I'm set here, I wonder
about the tcl/tk issue with matplotlib. I am using tcl/tk-8.4.15. I
wonder if it's too new ? Or is there some other package that is needed ?
Wayne
Eric Firing wrote:
> Wayne,
>
> Segfaults are generally caused by problems in extension code or
> libraries. The fact that the plotting works with a non-gui backend
> indicates that the problem is not in matplotlib's transform or Agg
> extension code, or in the bits of numpy code that get used along the
> way. I was pretty sure this would be the case; all of those
> components are solid and well-tested together, at least for simple
> plotting.
>
> That tends to throw suspicion on Tkinter/Tk/Tcl or one of mpl's
> extension bits that is run with Tk. I'm not sure there are any in
> this case.
>
> One way to narrow it down is to try another gui: gtk or qt. Do you
> have either of these libraries installed?
>
> Eric
>
> Wayne E. Harlan wrote:
>>
>>
>> Eric Firing wrote:
>>> Wayne,
>>>
>>> I'm stumped. Do you get a segfault only with the gui backend? Can
>>> you you do this:
>>>
>>> import matplotlib
>>> matplotlib.use('Agg')
>>> import pylab
>>> pylab.plot([1,2,3])
>>> pylab.savefig('test.png')
>>>
>>> Eric
>> <previous stuff snipped>
>>
>> OK, this worked. I have attached the test,png file that resulted.
>> But I don't quite know what this means ...
>>
>> IDLE 1.2.1 >>> import matplotlib
>> >>> matplotlib.use('Agg')
>> >>> import pylab
>> >>> pylab.plot([1,2,3])
>> [<matplotlib.lines.Line2D instance at 0x87cd56c>]
>> >>> pylab.savefig('test.png')
>> >>>
>>
>> The other suggestion from Michael about using gdb will have to wait
>> until I download, install and learn to use it, but if that's
>> required, that's what I'll do.
>>
>> Thanks
>>
>> Wayne
>>
>>
>> ------------------------------------------------------------------------
>>
>
>
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