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Matplotlib cannot parse TeX with \text command #18520
Description
Hello!
Minimal example:
import matplotlib as plt
fig, ax = plt.subplots()
ax.text(0, 0, r'$s_\text{ind}$')Result:
ValueError:
s_\text{ind}
^
Expected {accentprefixed | accent | symbol | c_over_c | function | group | frac | dfrac | stackrel | binom | genfrac | sqrt | overline | operatorname}, found 'e' (at char 4), (line:1, col:5)
As far as I remember, r means raw string, so \t mustn't interpreter as tab. I tried \\t and other ways to avoid this problem but I didn't find any workaround for this case yet... So it seems to me I found a bug.
I use Python 3.8.5 (default, Sep 3 2020, 21:29:08) [MSC v.1916 64 bit (AMD64)],
Matplotlib version is 3.3.1. I tried my code in JupyterLab ver. 2.2.7 on Windows 10.
Matplotlib backend is module://ipykernel.pylab.backend_inline.
Best regards,
Sindzicat.
Reacted by Takahiro Ueda
Activity
anntzer commentedon Sep 18, 2020
\textis not supported, but I agree that it should be, especially because I think it can just be mapped to\mathdefault; in fact\mathdefault/\mathregular(which are synonyms, and which both only exist in Matplotlib and not in TeX or any(?) package that I know of) could be (soft-)deprecated in favor of\text(which is from the pretty standardamsmath).sindzicat commentedon Sep 18, 2020
Sorry, I didn't expect, that there are some TeX commands, that aren't supported in Matplotlib yet. Is there any list of (un)suppoted TeX commands in Matplotlib?
anntzer commentedon Sep 18, 2020
See #14766.
sindzicat commentedon Sep 20, 2020
@anntzer, many thanks!
tueda commentedon Oct 23, 2021
It will be nice if the
\textcommand can be recognized in Matplotlib. As a first step,\textcan be mapped to\mathdefault, but the amsmath\textcommand keeps spaces in the given text while\mathdefaultdoes not.oscargus commentedon Jan 9, 2022
Another issue here (which is maybe more a theoretical issue maybe) is that
\textis supposed to use the text font, not the math font. However, I guess it is most commonly used to obtain upright text in math, rather than using the actual text font in equations. At least in the matplotlib context it seems like a fair approximation.(One should really need
\mathupor something similar to have a family independent, upright font in math mode.)