Adam Webb <adamwebb_rrs <at> yahoo.com> writes:
>
> Hi,
>
> I would like to add plots to a document using sagetex and my script
> uses matplotlib to generate the plot. Is it possible to matplotlib
> with sagetex? I understand that /sageplot{} wants a <graphics obj>
> with a .save method. However, I have not found how to generate such an
> object.
>
> For example if I use the simple example:
> sage: from pylab import *
> sage: t = arange(0.0, 2.0, 0.01)
> sage: s = sin(2*pi*t)
> sage: P = plot(t, s, linewidth=1.0)
> sage: xl = xlabel('time (s)')
> sage: yl = ylabel('voltage (mV)')
> sage: t = title('About as simple as it gets, folks')
> sage: grid(True)
> sage: savefig('sage.png')
>
> Where is the <graphics obj>?
>
> cheers,
> Adam
>
Hi,
i know that it's been a while since this question was asked, but since i
struggled with it a bit (and to have a reference for later), here's the
workaround i've come up with:
1. (assuming that this is the file that produces the Matplotlib figure, eg.
$HOME/sagetexInclude.py):
def f():
from numpy import arange
from matplotlib.pyplot import plot
plot(range(10), arange(1.5, 2.5, .1))
2. tweek the file $SAGE_ROOT/local/bin/sage-env (so that is uses PYTHONPATH)*:
" ...
PYTHONPATH="$SAGE_PATH:$SAGE_ROOT/local/lib/python:$PYTHONPATH" && export
PYTHONPATH
...
"
[*Note: now i see that probably setting SAGE_PATH to the appropriate value
would suffice]
3. in the .tex file do something like:
\begin{sagesilent}
import sagetexInclude as sti
import matplotlib.pyplot as plt
f = plt.figure() # so that we get a separate image for the plot
sti.f() # here we do the PLOTting
plt.save = plt.savefig # SageTeX's plotting apparently relies on *this*!
\end{sagesilent}
\begin{center} \sageplot{plt} \end{center} % plot as a normal Sage object
% this is not really necessary, but whatever
\begin{sagesilent} plt.close() \end{sagesilent}
4. generate latex and run sage on the file as usually (don't forget to set
PYTHONPATH or SAGE_PATH to the directory containing sagetexInclude [i.e. export
PYTHONPATH=$HOME:$PYTHONPATH]):
pdflatex texfile.tex
sage texfile.sage
pdflatex texfile.tex
Hope this helps [someone :) ].
Best regards,
Constantin
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