[Matplotlib-users] Creating Colored Axis Labels using LaTeX in Interactive Mode
Joseph Fox-Rabinovitz
jfoxrabinovitz at gmail.com
Mon Jul 11 15:06:52 EDT 2016
It seems that for the time being, `use('ps')` is the only way to get
the rendering done correctly. I was hoping to get something that
rendered with partial accuracy in interactive mode while allowing me
to save correctly to a file. Any objections to me filing an issue
about this?
Regards,
-Joe
On Mon, Jul 11, 2016 at 2:55 PM, Jens Nielsen <jenshnielsen at gmail.com> wrote:
> You are right. I suspect that the register_backend logic does not work
> correctly for png. The code produces the expected results
> in pdf with register_backend and in both pdf and png if I do
> matplotlib.use('pgf') so it would seem like there are at least 2 different
> bugs.
>
> The color does not work with the regular latex text backend.
>
> register_backend does not work correctly with png and the pgf backend.
>
> best
> Jens
>
>
>
>
> On Mon, 11 Jul 2016 at 18:49 Joseph Fox-Rabinovitz
> <jfoxrabinovitz at gmail.com> wrote:
>>
>> Thanks for the catch with `\usepackage{dashrule}`. Using matplotlib
>> 1.5, the code you posted does not work as expected. The labels are the
>> literal strings containing LaTeX commands, not the LaTeX output.
>> Adding in the commands under `# Text config` fixed at least that part
>> of the issue. It seems to be caused by the fact that I am using a
>> non-pgf backend by default.
>>
>> Regards,
>>
>> -Joe
>>
>>
>>
>> On Mon, Jul 11, 2016 at 12:35 PM, Jens Nielsen <jenshnielsen at gmail.com>
>> wrote:
>> > 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
>> >> _______________________________________________
>> >> Matplotlib-users mailing list
>> >> Matplotlib-users at python.org
>> >> https://mail.python.org/mailman/listinfo/matplotlib-users
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