On Dec 15, 3:49 am, emil wrote:
> On Dec 14, 9:13 pm, mankoff wrote:
>
>
> > Hi Sage Group,
>
> > I'm trying to use sage as a means to get a nice python installation,
> > without actually using sage. I hope this is an OK use of the software.
> > I imagine I'll transition to using the sage specific tools, but to
> > start I would like to work with just python.
>
> > I have installed sage (4.6) on OS X, and then set PATH, PYTHONPATH,
> > and DYLD_LIBRARY_PATH to the python distribution in sage. I seems to
> > work based on the simple test of:
>
> > % python
>
> > >>> import matplotlib, pylab
>
> > neither of which are accessible/usable with the default OS X install.
>
> > However, I am now running into a problem when I try to display
> > graphics with a GUI. If I run this which I think should give me a
> > simple empty window:
>
> > import pylab as P
> > P.figure()
> > P.show()
>
> > I get this error:
>
> > Your currently selected backend, 'agg' does not support show().
> > Please select a GUI backend in your matplotlibrc file ('/Users/mankoff/
> > local/sage/local/lib/python2.6/site-packages/matplotlib/mpl-data/
> > matplotlibrc')
> > or with matplotlib.use()
>
> > I've tried all the options listed in that file (PDF, MacOSX, GTK,
> > TkAgg, etc.), and also searching online suggested I use code like
> > this:
>
> > import matplotlib as mpl
> > mpl.use('TkAgg')
> > import pylab as P
> > P.figure()
> > P.show()
>
> > But nothing has worked yet. Any advice much appreciated.
>
> > Thanks,
>
> > -k.
>
> have you tried to call
>
> sage -python $*
>
> it should call sages python with the paths set up correctly, so you
> can import numpy, etc
>
> Regarding plotting and problems with the backend, I found this
> link:http://wiki.sagemath.org/sage_matlab
>
> I don't know if there is a backend included by default, but the link
> above should give you an idea how to set one up. I hope this is a
> starter ...
> emil
Hi Emil,
Thanks for that link and the sage -python (or -ipython) hint. That is
an easier way to launch python, and yes, I can now have access to all
the python libs that come with sage.
I worked through the steps on the URL you sent but cannot get 'native'
graphics in sage/python. I don't want to recompile matplotlib, sage,
maybe freetype, etc. The whole point of sage (for me) was to not build
these things from the ground up.
I can do without interactive graphics, what I have been looking for
is just a 'native' viewer, where I can plot(x) and see it, rather than
1) plot 2) save to PDF/PNG and 3) use a 3rd party viewer. But for now,
until this part of sage "just works", I think I'll do this 3 step
process.
Thanks,
-k.
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