matplotlib-users Mailing List for matplotlib

El Lunes, 20 de enero de 2014 09:23:59 Mauricio Calvao escribió:
> Your suggestion did work (when adding a colon after pgf.preamble, in the
> matplotlibrc file)
Ouch!
> 1) in the main tex file I added some surrounding text, to be able to check
> the matching of the fonts and it looked as if the family font were ok, but
> the size of the labels (xlabel and ylabel) as well as of the tick marker
> labels (numbers) were distinct (bigger) than of the surrounding main body
> text...
Oh, I'd forgotten that:
 matplotlibrc contents:
 [...]
 backend : Qt4Agg
 font.size : 10.0
 pgf.rcfonts : False
 pgf.texsystem : pdflatex
 pgf.preamble : \usepackage{/dev/shm/foo/foo}
 [...]
Yes, you have to set the same basic font size as you are going to use in your 
document, it is not fully automatic. If you are using something like 
\documentclass[12pt]{article}, you have to set font.size : 12.0. You can 
programmatically change font.size from within the python script after parsing 
the main tex file:
#!/usr/bin/env python
import matplotlib.pyplot as plt
import matplotlib as mpl
import numpy as np
import re
with open('foo.tex') as f:
 for line in f:
 if 'documentclass' in line:
 try:
 match = re.search('[0-9]+pt', line).group(0)
 font_size = float(match.replace('pt', ''))
 except:
 font_size = 10.
mpl.rcParams.update({'font.size': font_size})
x = np.linspace(0, 4. * np.pi)
y = np.sin(x) ** 2
fig = plt.figure(figsize=(3, 3))
ax = plt.gca()
ax.plot(x, y)
ax.set_xlabel(r'$x$')
ax.set_ylabel(r'$\sin \left( x \right) ^ 2$')
plt.savefig('/path_to_your_project/foo.pgf')
This code reads your tex file (foo.tex), searches for a line containing 
\documentclass, searches for the font size (10pt, 9pt, 12pt, whatever) and 
uses it as the plot standard font size. If no font size parameter is found in 
foo.tex, it defaults to 10pt.
> 2) since no separate file, with only the text objects (letters, numbers,
> labels, annotations, legends, etc) is generated, I am not able to change
> them accordingly, later, via Latex itself. That's what gnuplot and inkscape
> allow us to do, through the generation of an explicit separate file for the
> text objects...
Indeed, you can change the text. It is in the pgf file, inside \pgftext 
environments. The example script I've used generates, among other things, the 
following line in foo.pgf:
 \pgftext[x=0.072574in,y=1.500000in,,bottom,rotate=90.000000]
{{\sffamily\fontsize{10.000000}{12.000000}\selectfont \(\displaystyle \sin 
\left( x \right) ^ 2\)}}%
which is the y label.
It is far from ideal, whith its lack of resizing capabilities, but maybe in 
future versions the pgf code gets some improvements so it uses tikz and allows 
to use things like tikzscale (which, as far as i know, can't be used now to 
scale a figure generated by matplotlib).
-- 
Luis Miguel García-Cuevas González

El Sábado, 18 de enero de 2014 17:09:30 Mauricio Calvao escribió:
> Hi
> 
> I would like to know whether it is possible to save a simple (or complex,
> for that matter) figure in 2 files, such that one of them contains, for
> instance, the lines or points or surfaces ("graphics") typically in pdf
> format and the other contains the whole text of the figure (labels,
> numbers, title, annotations, etc). This is achievable in gnuplot via its
> epslatex terminal and is highly convenient, in the sense that the fonts of
> the figure match exactly the fonts (size, family, etc) of the main text in
> which it will be embedded; even if we resize the figure, the corresponding
> text, in perfect beautiful Latex, will match the surrounding main body text
> of the master document. This is also possible with Inkscape and its
> PDF+Latex saving option.
> 
> Is this possible with matplotlib or are there any workarounds?
If you only want to get a figure where the rendering of the text is done with 
latex, you can use savefig in pgf format. As an example:
 Contents of matplotlibrc:
 [...]
 backend : Qt4Agg
 pgf.rcfonts : False
 pgf.texsystem : pdflatex
 pgf.preamble \usepackage{path_to_your_document/foo}
 [...]
 Script to create the figure:
 #!/usr/bin/env python
 import matplotlib.pyplot as plt
 import numpy as np
 x = np.linspace(0, 4. * np.pi)
 y = np.sin(x) ** 2
 fig = plt.figure(figsize=(3, 3))
 ax = plt.gca()
 ax.plot(x, y)
 ax.set_xlabel(r'$x$')
 ax.set_ylabel(r'$\sin \left( x \right) ^ 2$')
 plt.savefig('path_to_your_document/foo.pgf')
 Main document:
 \documentclass{article}
 \usepackage{foo}
 \begin{document}
 \begin{figure}[H]
 \input{foo.pgf}
 \end{figure}
 \end{document}
 Style file (foo.sty):
 
 \usepackage{amsmath}
 \usepackage{float}
 \usepackage{fouriernc}
 \usepackage{graphicx}
 \usepackage{pgf}
The main problem with this, is that you can not resize the figure (i.e., with 
a resizebox) without also resizing the text. If you want to get the figure 
with a bigger or smaller size, you have to regenerate the file changing its 
figsize. The benefit of this method is that all the drawing is made by latex, 
so you have perfectly matched fonts, colors...
-- 
Luis Miguel García-Cuevas González