using mathfrak in matplotlib label returns Undefined control sequence

Question

When I set text.usetex : True in my matplotlibrc and then try to add a text or label with \mathfrak{} I get an error (Undefined control sequence)

RuntimeError: latex was not able to process the following string:
b'$\\\\mathfrak{F}$'
...
*geometry* driver: auto-detecting
*geometry* detected driver: dvips
! Undefined control sequence.
<recently read> \mathfrak 
                          
l.19 {\rmfamily $\mathfrak
                          {F}$}
No pages of output.

Other font styles such as \mathcal{} work without issues.

Another thing that I tried was to set text.usetex : False and then specify that I want to use Computer Modern as the default font but seems like matplotlib is unable to find serif or sans-serif and falls back to DejaVu Sans:

findfont: Font family ['sans-serif'] not found. Falling back to DejaVu Sans.

Although in this last case, I can use \mathfrak{} without any problems.

Any ideas how to fix this? Thanks.

From the tex perseptive: you need to load one of the packages which provide `\mathfrak`, e.g. `\usepackage{amssymb}` — samcarter_is_at_topanswers.xyz, Jun 28 '21 at 12:40
maybe you can try this: https://stackoverflow.com/a/41453758/2777074 — samcarter_is_at_topanswers.xyz, Jun 28 '21 at 12:42
@samcarter_is_at_topanswers.xyz that solved it. Many thanks. — thepaips, Jun 28 '21 at 12:48
Good to hear that your problem is solved! Would be nice if you could write up an answer so users with the same problem will be able to find it. — samcarter_is_at_topanswers.xyz, Jun 28 '21 at 12:58

score 3 · Answer 1 · answered Jun 28 '21 at 13:26

3

@samcarter_is_at_topanswers.xyz gave the answer that solves this.

Adding text.latex.preamble : \usepackage{amssymb} \usepackage{amsmath} to your .matplotlibrc does the trick.

answered Jun 28 '21 at 13:26

thepaips

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using mathfrak in matplotlib label returns Undefined control sequence

1 Answers1