When I try to use the LaTeX amsmath package in matplotlib, I get a slew of incomprehensible errors. Has anyone been able to make something like this work? If so, I would love to see an example.
Here is what I've tried:
import matplotlib from matplotlib import pyplot from numpy import arange x= arange(5) y= x**1.5 matplotlib.rc('text', usetex = True) matplotlib.rc('font', **{'family' : "sans-serif"}) params= {'text.latex.preamble' : [r'\usepackage{amsmath}']} pyplot.rcParams.update(params) fig= pyplot.figure(figsize=[10,7], dpi=120, facecolor=[1, 1, 1]) pyplot.plot(x, y, linewidth=2) pyplot.title(r"""$f(x)= \begin{cases} \a*x^\{1.5\}2 + c,& \text{if } -1 \leq x \leq 1\\ 0, & \text{otherwise} \end{cases}""") pyplot.show() This code creates the following error:
RuntimeError: LaTeX was not able to process the following string: ' \\\\begin{cases}' Here is the full report generated by LaTeX: This is pdfTeX, Version 3.14159265-2.6-1.40.18 (MiKTeX 2.9.6300 64-bit) entering extended mode (1727d2fa12a0305b2ddc30e92e4e21fa.tex LaTeX2e <2017-04-15> Babel <3.9r> and hyphenation patterns for 75 language(s) loaded. ("C:\Program Files\MiKTeX 2.9\tex\latex\base\article.cls" Document Class: article 2014/09/29 v1.4h Standard LaTeX document class ("C:\Program Files\MiKTeX 2.9\tex\latex\base\size10.clo")) (C:\Users\s117250\AppData\Roaming\MiKTeX\2.9\tex\latex\type1cm\type1cm.sty) ("C:\Program Files\MiKTeX 2.9\tex\latex\base\textcomp.sty" ("C:\Program Files\MiKTeX 2.9\tex\latex\base\ts1enc.def")) ("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsmath.sty" For additional information on amsmath, use the `?' option. ("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amstext.sty" ("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsgen.sty")) ("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsbsy.sty") ("C:\Program Files\MiKTeX 2.9\tex\latex\amsmath\amsopn.sty")) ("C:\Program Files\MiKTeX 2.9\tex\latex\geometry\geometry.sty" ("C:\Program Files\MiKTeX 2.9\tex\latex\graphics\keyval.sty") ("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ifpdf.sty") ("C:\Program Files\MiKTeX 2.9\tex\generic\oberdiek\ifvtex.sty") ("C:\Program Files\MiKTeX 2.9\tex\generic\ifxetex\ifxetex.sty") ("C:\Program Files\MiKTeX 2.9\tex\latex\geometry\geometry.cfg") Package geometry Warning: Over-specification in `h'-direction. `width' (5058.9pt) is ignored. Package geometry Warning: Over-specification in `v'-direction. `height' (5058.9pt) is ignored. ) (1727d2fa12a0305b2ddc30e92e4e21fa.aux) ("C:\Program Files\MiKTeX 2.9\tex\latex\base\ts1cmr.fd") *geometry* driver: auto-detecting *geometry* detected driver: dvips ! Missing $ inserted. <inserted text> $ l.12 ...0000}{15.000000}{\sffamily \begin{cases} } ! LaTeX Error: \begin{cases} on input line 12 ended by \end{document}. See the LaTeX manual or LaTeX Companion for explanation. Type H <return> for immediate help. ... l.13 \end{document} (1727d2fa12a0305b2ddc30e92e4e21fa.aux) ! You can't use `\end' in internal vertical mode. \enddocument ... \endgroup \deadcycles \z@ \@@end l.13 \end{document} ! LaTeX Error: \begin{cases} on input line 12 ended by \end{document}. See the LaTeX manual or LaTeX Companion for explanation. Type H <return> for immediate help. ... l.13 \end{document} ! Missing } inserted. <inserted text> } l.13 \end{document} ! Missing \right. inserted. <inserted text> \right . l.13 \end{document} ! Missing $ inserted. <inserted text> $ l.13 \end{document} ) ! Emergency stop. <*> ./1727d2fa12a0305b2ddc30e92e4e21fa.tex No pages of output. Transcript written on 1727d2fa12a0305b2ddc30e92e4e21fa.log. 
