On Tue, Aug 3, 2010 at 11:12 PM, Michael Hannon <jm_han...@yahoo.com> wrote:
> Greetings. I'm unable to get mathtext to work properly on my linux system:
>
> # cat /etc/redhat-release
> Fedora release 13 (Goddard)
>
> # uname -a
> Linux localhost.localdomain 2.6.33.6-147.2.4.fc13.x86_64 #1 SMP Fri Jul
> 23
> 17:14:44 UTC 2010 x86_64 x86_64 x86_64 GNU/Linux
>
> The problem is essentially identical to one that is described in the thread
> at:
>
>
> http://www.mail-archive.com/matplotlib-users@lists.sourceforge.net/msg09208.html
>
> I didn't see a real resolution to the problem in that thread, at least not
> one
> that applied to me.
>
> In brief, when I specify a math symbol in a text string, say:
>
> r'$\pi$'
>
> I get some "random" character (capital A in this case) at the place where
> I'm
> supposed to see the Greek letter Pi.
>
> Furthermore, if I try to coerce the use of the Greek letters by setting
> "text.markup" to "tex", either interactively or in the rc file, I get an
> error
> saying that it's not a valid parameter:
>
> Bad key "text.markup" on line 161 in ... matplotlibrc
>
> for instance. This is followed by the message:
>
> You probably need to get an updated matplotlibrc file from
> http://matplotlib.sf.net/_static/matplotlibrc or from the matplotlib
> source distribution
>
> But the file at that link still contains:
>
> #text.markup:'plain' # Affects how text, such as titles and labels, are
> # interpreted by default.
> # 'plain': As plain, unformatted text
> # 'tex': As TeX-like text. Text between $'s
> # will be
> # formatted as a TeX math expression.
> # This setting has no effect when text.usetex
> # is True.
> # In that case, all text will be sent to TeX
> # for
> # processing.
>
> I don't know what to make of this. I did the following to try to pin down
> the
> parameters:
>
> import matplotlib as mpl
> import pprint
> x = mpl.rcParams.keys()
> x.sort()
> pprint.pprint(x)
>
> This produced:
>
> .
> .
> .
> 'svg.image_noscale',
> 'text.color',
> 'text.dvipnghack',
> 'text.fontangle',
> 'text.fontsize',
> 'text.fontstyle',
> 'text.fontvariant',
> 'text.fontweight',
> 'text.latex.preamble',
> 'text.latex.preview',
> 'text.latex.unicode',
> 'text.usetex',
> 'timezone',
> .
> .
> .
>
> Indeed, there does not seem to be a "text.markup" in this list.
>
> I have tried this both with and without an rc file, and I've tried it after
> deleting completely my .matplotlib directory. I get the same results in
> all
> cases.
>
> OTOH, if I set:
>
> text.usetex
>
> to "True", I do get the expected mathematical symbols, albeit after a
> noticeable
> delay.
>
> I've got the following two matplotlib packages installed:
>
> python-matplotlib-0.99.1.2-4.fc13.x86_64
> python-matplotlib-tk-0.99.1.2-4.fc13.x86_64
>
> and the system is running Python 2.6.4.
>
> Any suggestions? Maybe I'm missing a package?
>
> Thanks.
>
> -- Mike
>
>
>
Mike,
Wow, I hadn't realized that Fedora 13 is carrying a rather old version of
matplotlib (~2 years old). I should double-check what version is in rawhide
and possibly prod some people to get them to choose a more recent version...
I am not exactly sure what the cause of your problem is, but you could try
uninstalling the Fedora packages of matplotlib and install the latest
version from source. Unless someone else has a better idea about what the
cause of the problem is?
Ben Root
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