I'm seeing this here, too.  Something must have been messed up recently 
in SVN.  I'm looking into it.

Mike

Zane Selvans wrote:
>> We have two modes to render latex -- one is native TeX layout and uses
>> latex and dvipng, and is superior if you need all of TeX's
>> capabilities (eg an eqnarray), but the fonts are suboptimal.  The
>> other is mathtext, which will cover 98% of most users' math needs,
>> does not require a latex install because it is pure mpl, and uses
>> nicer fonts .
>
> Well, if I turn off usetex, then the LaTeX symbols don't get rendered 
> correctly.  It's obviously trying to do something other than just 
> write out the plain text, but it's not doing the right thing.  I quit 
> out of matplotlib, and re-purged all the cached stuff from my 
> .matplotlib directory, and it's still failing.  From the docs, it 
> sounds like mathtext is just the default way for Text objects to get 
> rendered.  It fails the same way irrespective of whether I use a raw 
> string, or a double-quoted string:
>
> fit_ax.set_ylabel(r'$\delta_{rms}$ [degrees]')
> fit_ax.set_ylabel("$\delta_{rms}$ [degrees]")
>
> both give a capital 'C' with a subscript 'rms'
>
> $\bar{D}$ results in a capital D with a little circle over it.
>
> $20^\circ$ yields 20 raised to the little tiny 'e' power.
> Even if I wipe my site-packages/matplotlib* directory and egg-info, 
> make clean, and recompile and install matplotlib from the SVN source, 
> I still get the same problem.  I don't know if it means anything, but 
> I note that the mpl-data/fonts directory in SVN has 282 sub-entries, 
> and the mpl-data/fonts directory that's getting installed in my 
> site-packages only has 99 sub-entries.  But maybe they aren't supposed 
> to be the same?  Dunno.
> So for now I can only get my math symbols to render with text.usetext 
> turned on.
I'm seeing

-- 
Michael Droettboom
Science Software Branch
Operations and Engineering Division
Space Telescope Science Institute
Operated by AURA for NASA


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