Dear Mike & Paul,
Thanks for your replies. I tried Mike's protocol, and I found that
font_manager found the Arial font ("C:\\Windows\\fonts\\Arial.ttf") in the
right place. I don't have fontforge yet, so I guess I need to install and
check it out.
But the thing that bothers me about this error is that it only occurs if I try
to mix mathtext and non-matplotlib font. So matplotlib finds Arial just fine.
And it finds the mathtext font fine. Only the mixture is fatal. It's as if
the parser loses track of the Arial font, or it looks for a mathtext glyph in
Arial. Very strange that it occurs only in Windows 8.
Regarding Paul's response, I don't have LaTeX on the W8 computer, and my
impression is that mathtext doesn't look for "mathematical Arial", instead
there are some packaged fonts that it uses for this purpose, like Computer
Modern and STIX.
I'll try to hunt this down further, and let you know if I find anything.
Best,
Chad
________________________________
From: Michael Droettboom <md...@stsci.edu>
To: matplotlib-users@lists.sourceforge.net
Sent: Thursday, January 10, 2013 7:35 AM
Subject: Re: [Matplotlib-users] mathtext and fonts under Windows 8
Since this is specific to Windows 8, I wonder if the Arial font has been
updated in that version. If it's a newer OTF font, rather than a TTF font,
it's possible matplotlib can't read it correctly.
You can see what font file is on each platform by starting up a Python prompt
and doing:
>>> from matplotlib import font_manager
>>> font_manager.findfont("Arial")
It should display the path to the font. From that, you should be able to get
the Arial file on each of your platforms and see if they are different. To get
more details, you could open them up in the open source "fontforge" tool.
Sorry I can't do this myself, as I don't have access to anything past XP.
If the fonts turn out to be different, as a workaround, you could try backing
up and then replacing the Arial font on your Windows 8 machine with the one on
your Windows 7 machine.
Cheers,
Mike
On 01/09/2013 11:59 PM, Paul Hobson wrote:
Sounds like it might have something to do with your Latex installation (if any)
or the barebones Latex-rendering done by MPL alone. Namely, they simply don't
have the characters for mathematical Arial available.
>
>
>Not too sure though. Hopefully someone more knowledgeable responds.
>-paul
>
>
>
>On Tue, Jan 8, 2013 at 9:31 PM, CAB <cabr...@yahoo.com> wrote:
>
>Hi, All,
>>
>>I am encountering a thorny problem when trying to run matplotlib under
>>Windows 8. If I label an axis using a command like
>>
>>ax.set_ylabel(r'time (s)', name='Arial'),
>>
>>all is well. But if try to add mathtext to that, as in
>>
>>ax.set_ylabel(r'time ($s$)', name='Arial'),
>>
>>mathtext.py throws an error (a very long stream) ending in "RuntimeError:
>>Face has no glyph names". If I remove the "name='Arial'" above and let the
>>program default to Bitstream Vera Sans, the mathtext works.
>>
>>
>>
>>This problem does not occur under Windows 7 or XP; only under two different
>>Windows 8 installations. Any ideas what's going on?
>>
>>
>>Chad
>>
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