Latex and text in matplotlib title

Question

I'm trying to show an image with a title that combines normal text with a couple of Latex commands:

plt.imshow(w1subtracted2, origin='lower',
          extent=[l_max, -l_max, -b_max, b_max],
          cmap = color_map)
plt.title('W1 disk and central $\pm2\textdegree$ subtracted', fontsize = 'small')
plt.xlabel(xlabel, fontsize = 'small')
plt.ylabel(ylabel, fontsize = 'small')
plt.savefig('w1subtracted2.png')

but I can't get the title showing the \pm and \textdegree to show in Latex style. How can I achieve that?

Andras Deak -- Слава Україні · Accepted Answer · 2020-02-11 22:28:55Z

32

It seems you are not using latex (usetex = True) but simple MathText. There is no \textdegree in MathText.

Using

plt.title(r'W1 disk and central $\pm2^\circ$ subtracted', fontsize='small')

should give you

edited Feb 11, 2020 at 22:28

Andras Deak -- Слава Україні

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answered Oct 12, 2017 at 9:39

ImportanceOfBeingErnest

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4 Comments

Nick Vence Over a year ago

and where should usetex = True go?

Florent F Over a year ago

In matplotlib's rcParams. See the documentation here: matplotlib.org/stable/tutorials/text/usetex.html

Gabriel Over a year ago

This are the required lines for this answer to work: import matplotlib as mpl ; mpl.rcParams['text.usetex'] = True

Josiah Yoder Over a year ago

I like how this answer encourages solutions that don't use usetex = True. The built-in MathText seems cleaner where it will work.

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