If the LaTeX strings are not intepreted in matplotlib (e.g., in the xlabel), check your configuration file
( see previous post for matplotlib configuration file).
You can either do it for one session :
rc('text', usetex=True) plot([1,2],[3,4]); title('a^2') |
or permanently within the matplolibrc by adding this line:
text.usetex : true |
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