>>> This is what I have:
>>> OS X Lion
>>> Fresh install of python 2.6 from macports
>>> Numpy version 1.6.1 (from macports)
>>> freetype (from macports)
>>> libpng (from macports)
>>> matplotlib 1.0.1 (from macports)
>>>
>>> When I run my plotting script, I get the following error as soon as the
>>> script starts (i.e., right after matplotlib is imported):
>>> /opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/__init__.py:403:
>>> UserWarning: matplotlibrc text.usetex can not be used with *Agg backend
>>> unless dvipng-1.5 or later is installed on your system
>>> warnings.warn( 'matplotlibrc text.usetex can not be used with *Agg '
>>>
>>> Note: I am using the PDF backend.
>>>
>>> When I try to save the plot to a pdf file, I get the following error:
>>> /opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/font_manager.py:1242:
>>> UserWarning: findfont: Font family ['serif'] not found. Falling back to
>>> Bitstream Vera Sans
>>> (prop.get_family(), self.defaultFamily[fontext]))
>>>
>>> This is frustrating because it's a serif font that I need.
>>>
>>> After much thought, and Googling, I found out how to suppress the first
>>> warning message, and that is to add the directory where dvipng lives to my
>>> PATH variable. It is worth noting here that dvipng version 1.5 does not
>>> exist. The latest version is 1.14 as can be seen here:
>>> http://download.savannah.gnu.org/releases/dvipng/
>
>
> Actually 1.5 does exist, it's just older than 1.14 (think of it as 1.05). Are
> you sure that Matplotlib could "see" dvipng when it was built? During the
> install, it should spit out a bunch of details at the beginning with a few
> headings in all caps. Under the heading "OPTIONAL USETEX DEPENDENCIES",
> what's listed next to dvipng?
>
> -Tony
Hey Tony,
Thanks for your suggestion. I think it fixed the problem, at least for the
build from source. I haven't tried the macports version, but for anyone with
the same problem that's interested, you should run
sudo port install py26-matplotlib +dvipng +latex
if you want it to build with those optional dependencies.
Damon McDougall
d.mcdoug...@warwick.ac.uk
http://damon.is-a-geek.com
B2.39
Mathematics Institute
Coventry
West Midlands
CV4 7AL
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