PR summary

Closes #29516 , I have a few things to address here, this PR fixes errors for this type of case:

import matplotlib.pyplot as plt, numpy as np

ax = plt.figure().add_subplot()
ax.annotate('', (0, 0), (np.nan, np.nan), arrowprops={})

plt.show()

It checks that the coordinates for xytext are a finite number, and if it isn't, the text and the arrow are not drawn, same behaviour as check_xy.

I wasn't able to reproduce the first error in the thread in a similar environment, and for this other piece of code:

import matplotlib.pyplot as plt

ax = plt.figure().add_subplot(projection="polar")
ax.set_ylim(.25, 1.25)
ax.annotate('', (0, .5), (0, 0), arrowprops={})

plt.show()

the error seems to be related to set_ylim, if you remove that, it works. Also, if you change the y coordinate for xy to be less than ylim's bottom, for example:

import matplotlib.pyplot as plt

ax = plt.figure().add_subplot(projection="polar")
ax.set_ylim(.25, 1.25)
ax.annotate('', (0, .2499), (0, 0), arrowprops={})

plt.show()

it seems to work for anything < ylim's bottom (.25 in this case), so I guess the error appears when the text is supposed to be visible, this behaviour is weird and the easiest solution I can think of is just to not apply/allow ylim because it doesn't do anything in polar coordinates, but I don't have enough context to know if that's a good idea or even possible so I would like feedback on that 🙂.

PR checklist

• "closes #0000" is in the body of the PR description to link the related issue
• new and changed code is tested
• [N/A] Plotting related features are demonstrated in an example
• [N/A] New Features and API Changes are noted with a directive and release note
• [N/A] Documentation complies with general and docstring guidelines