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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"set_rgrids() in a polar plot cannot set ticklabel size","articleBody":"### Bug report\r\n\r\nIn a polar plot, I want to set the sizes of the r and theta ticklabels. While setting the theta ticklabel size works with the method `set_thetagrids`, setting the r ticklabel size with `set_rgrids` does not work.\r\n\r\nAs an aside, I find it confusing that some functions for setting theta parameters require arguments in radians (e.g., `set_thetalim`), while others require arguments in degrees (e.g., `set_thetagrids`).\r\n\r\n**Code snippet**\r\n```python\r\nfrom matplotlib import pyplot as plt\r\nimport numpy as np\r\n\r\nfig = plt.figure()\r\nax = plt.axes(polar=True)\r\nax.set_thetalim(0., np.pi/4.)\r\nax.set_rlim(0., 2.)\r\n\r\n# set the size of theta ticklabels (works)\r\nthetatick_locs = np.linspace(0.,45.,4)\r\nthetatick_labels = [u'%i\\u00b0'%np.round(x) for x in thetatick_locs]\r\nax.set_thetagrids(thetatick_locs, thetatick_labels, fontsize=16)\r\n\r\n# set the size of r ticklabels (does not work)\r\nrtick_locs = np.arange(0.5,2.0,0.7)\r\nrtick_labels = ['%.1f'%r for r in rtick_locs]\r\nax.set_rgrids(rtick_locs, rtick_labels, fontsize=16)\r\n\r\nplt.show()\r\n```\r\n\r\n**Actual outcome**\r\nSee [figure](https://gmao.gsfc.nasa.gov/gmaoftp/sourish/bug_report_graphics/polar_plot_bug.png)\r\n\r\n**Expected outcome**\r\nI expect to be able to set the font properties of r ticklabels. Other settings, such as trying to set the font weight, does not work either.\r\n\r\n**Matplotlib version**\r\n  * Operating system: Macos 10.15.4 (Catalina)\r\n  * Matplotlib version: 3.2.1 (installed via macports)\r\n  * Matplotlib backend: Qt5Agg\r\n  * Python version: 3.8.2 (installed via macports)\r\n","author":{"url":"https://github.com/AgilentGCMS","@type":"Person","name":"AgilentGCMS"},"datePublished":"2020-05-20T14:19:04.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/17463/matplotlib/issues/17463"}