[Matplotlib-users] Creating Colored Axis Labels using LaTeX in Interactive Mode
Jens Nielsen
jenshnielsen at gmail.com
Mon Jul 11 12:35:53 EDT 2016
I can confirm that this does not work as expected but I don't know exactly
why.
With regards to your pgf example. It seems to be missing a \usepackage{
dashrule}
The following runs for me but still generates the black non colored bars.
The # Text config seems to do nothing in my test so I'm not sure why you
need to set it.
If I save the pgf backend to a .pgf file and include it in a texfile as
below everything looks correct in that example
test.py
```
import matplotlib
from matplotlib.backends.backend_pgf import FigureCanvasPgf
matplotlib.backend_bases.register_backend('png', FigureCanvasPgf)
from matplotlib import pyplot as plt
matplotlib.rc('pgf', texsystem='pdflatex') # from running latex -v
preamble = matplotlib.rcParams.setdefault('pgf.preamble', [])
preamble.append(r'\usepackage{color}')
preamble.append(r'\usepackage{dashrule}')
# Text config
#matplotlib.rc('text', usetex=True)
# preamble = matplotlib.rcParams.setdefault('text.latex.preamble', [])
#preamble.append(r'\usepackage{color}')
#preamble.append(r'\usepackage{dashrule}')
ax = plt.plot((0, 1), (1, 2))[0].axes
ax.set_ylabel(r'Y $\;$ \textcolor[rgb]{1.0, 0.0,
0.0}{\hdashrule[0.5ex]{3cm}{1pt}{1pt 0pt}}')
ax.set_xlabel(r'N $\;$ \textcolor[rgb]{0.0, 1.0,
0.0}{\rule[0.5ex]{3cm}{1pt}}')
plt.savefig('test.pgf')
plt.savefig('test.png')
```
test.tex
```
\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[english]{babel}
\usepackage{color}
\usepackage{dashrule}
\usepackage{pgf}
\begin{document}
\input{test.pgf}
\end{document}
```
and running pdflatex test.tex generates a test.pdf that looks as expected.
best
Jens
On Mon, 11 Jul 2016 at 17:08 Joseph Fox-Rabinovitz <jfoxrabinovitz at gmail.com>
wrote:
> Have an update on my previous question. I have tried to follow the
> instructions at http://matplotlib.org/users/pgf.html for settting up
> the PGF backend for PNG and PDF rendering. This method does not work
> either:
>
> import matplotlib as mpl
> from matplotlib.backends.backend_pgf import FigureCanvasPgf
> matplotlib.backend_bases.register_backend('png', FigureCanvasPgf)
> from matplotlib import pyplot as plt
>
> matplotlib.rc('pgf', texsystem='pdflatex') # from running latex -v
> preamble = matplotlib.rcParams.setdefault('pgf.preamble', [])
> preamble.append(r'\usepackage{color}')
>
> # Text config
> matplotlib.rc('text', usetex=True)
> preamble = matplotlib.rcParams.setdefault('text.latex.preamble', [])
> preamble.append(r'\usepackage{color}')
>
> ax = plt.plot((0, 1), (1, 2))[0].axes
> ax.set_ylabel(r'Y $\;$ \textcolor[rgb]{1.0, 0.0,
> 0.0}{\hdashrule[0.5ex]{3cm}{1pt}{1pt 0pt}}')
> ax.set_xlabel(r'N $\;$ \textcolor[rgb]{0.0, 1.0,
> 0.0}{\rule[0.5ex]{3cm}{1pt}}')
> plt.savefig('test.png')
>
> Yields the exact same figure and PNG file with the incorrect black
> lines as above. Note that turning off the three lines under `# Text
> config` makes the TeX commands print out verbatim, even in the saved
> figure. Perhaps there is a way to render the PNG correctly without
> pre-clobbering with the text system?
>
> Regards,
>
> -Joe
>
>
>
> On Mon, Jul 11, 2016 at 11:12 AM, Joseph Fox-Rabinovitz
> <jfoxrabinovitz at gmail.com> wrote:
> > I originally posted to Stack Overflow at
> > http://stackoverflow.com/q/38274681/2988730 (and accidentally to the
> > SourceForge version of this list).
> >
> > I am trying to follow the answer at
> > http://stackoverflow.com/a/38008501/2988730 to an earlier question of
> > mine to create colored and styled legend-like entries. I have the
> > following code:
> >
> > import matplotlib as mpl
> > mpl.use('ps')
> > from matplotlib import pyplot as plt
> >
> > mpl.rc('text', usetex=True)
> > mpl.rc('text.latex',
> preamble='\\usepackage{color}\n\\usepackage{dashrule}')
> >
> > plt.ion()
> > ax = plt.plot((0, 1), (1, 2))[0].axes
> > ax.set_ylabel(r'Y $\;$ \textcolor[rgb]{1.0, 0.0,
> > 0.0}{\hdashrule[0.5ex]{3cm}{1pt}{1pt 0pt}}')
> > ax.set_xlabel(r'N $\;$ \textcolor[rgb]{0.0, 1.0,
> > 0.0}{\rule[0.5ex]{3cm}{1pt}}')
> > plt.savefig('test.ps')
> >
> > The result is as expected. The labels contain black text with a red
> > line on the Y label and a green line on the X label:
> > http://i.stack.imgur.com/JCiLI.png.
> >
> > However, when I try the exact same set of commands without the
> > `mpl.use('ps')` line (using `'qt4agg'` backend on my system), the
> > figure neither saves corectly nor shows up correctly on screen:
> >
> > import matplotlib as mpl
> > from matplotlib import pyplot as plt
> >
> > mpl.rc('text', usetex=True)
> > mpl.rc('text.latex',
> preamble='\\usepackage{color}\n\\usepackage{dashrule}')
> >
> > plt.ion()
> > ax = plt.plot((0, 1), (1, 2))[0].axes
> > ax.set_ylabel(r'Y $\;$ \textcolor[rgb]{1.0, 0.0,
> > 0.0}{\hdashrule[0.5ex]{3cm}{1pt}{1pt 0pt}}')
> > ax.set_xlabel(r'N $\;$ \textcolor[rgb]{0.0, 1.0,
> > 0.0}{\rule[0.5ex]{3cm}{1pt}}')
> >
> > plt.savefig('test.png')
> > plt.show()
> >
> > The result of `plt.savefig` (http://i.stack.imgur.com/h2LXn.png) and
> > `plt.show` (http://i.stack.imgur.com/0Ow7c.png) are basically the same
> > in this case. The lines after the text show up black.
> >
> > How do I get the colors to show up in the labels with the default
> > interactive backend?
> >
> > Regards,
> >
> > -Joe
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> Matplotlib-users at python.org
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>
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