Werner Hoch writes:
> What is Tex output? Do you mean postscript or eps?
>
> > sh: line 1: 11319 Segmentation fault gs -dBATCH -dNOPAUSE
> > -r6000 -sDEVICE=pswrite -sPAPERSIZE=letter
> > -sOutputFile="/tmp/ef684d47fbac423478eccceef602c8ca.ps"
> > "/tmp/ef684d47fbac423478eccceef602c8ca"
> > >"/tmp/ef684d47fbac423478eccceef602c8ca.output"
OK, so I have updated to the latest RPMs and investigated a bit
further. The gs segfault occurs when setting "usetex=True" AND trying
to save to an eps figure.
Demonstration: take tex_demo.py from the examples collection on the
matplotlib site. It runs OK. Now change savefig('tex_demo') to
savefig('tex_demo.eps'). Boom.
Probably a bug with the Suse gs rather than matplotlib, but pretty
annoying anyway because one would like to produce eps rather than
bitmapped figures for publication quality images.
> Can you please provide some informations about your setup?
> OS = SuSE 10.2
> arch = i586
python shell = ipython or even the standard python interpreter
> backend your trying to use (Agg is default, set it to TkAgg if you like
> to use matplotlib interactively)
> interactive value in matplotlibrc
OK, here is the problem. With the latest RPM I get
[EMAIL PROTECTED]:~/Desktop/examples> ipython -pylab
[Lots of backtrace...]
ImportError: No module named wx
Missing dependency? In any case, after setting the backend to GTKAgg
in matplotlibrc, everything works. I believe that's also the default
in the Fedora RPM.
The following tests with GTKAgg backend setting:
> Minimum Testcode for matplotlib:
> -------
> from pylab import *
>
> a = arange(0,10,0.01)
> plot(a, sin(a))
> grid()
> savefig("abc.png")
> -------
> Does it work?
Yes.
> Testcode for postscript:
> -------
> from pylab import *
>
> a = arange(0,10,0.01)
> plot(a, sin(a))
> grid()
> savefig("abc.ps")
> -------
> Does it work?
Yes.
OK, so boiled the problem with usetex=True down to the following pair
of working vs. nonworking code. Wierd.
File working.py:
================
#!/usr/bin/env python
from pylab import *
rc('text', usetex=True)
a = arange(0,10,0.01)
plot(a, sin(a))
grid()
savefig("abc.ps")
show()
File nonworking.py:
===================
#!/usr/bin/env python
from pylab import *
rc('text', usetex=True)
a = arange(0,10,0.01)
plot(a, sin(a)+2)
savefig("abc.ps")
show()
> After changing the settings for the backend and interactive mode.
> Does the following code produce a plot when entered into a shell?
> ---------
> from pylab import *
> plot([1,2,3,3,2,3])
> ---------
As descibed above, changing backend is necessary to do anything...
Did not systematically try all the backends. Would be nice if the
default was working.
> Can you provide the version of your Fedora and the Version of the
> matplotlib package?
> It would be much easier to track the differences and fix the package.
http://mirrors.usc.edu/pub/linux/distributions/fedora/extras/6/SRPMS/python-matplotlib-0.87.7-3.fc6.src.rpm
Thanks a lot,
Marcel
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