René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Computer Modern Glyph Error","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Bug report\r\n\r\nTrying to use computer modern roman (cmr10) font in plot. Getting an error which prevents minus sign rendering in plot.\r\n\r\n```\r\nimport matplotlib as mpl\r\nimport matplotlib.pyplot as plt\r\n\r\nmpl.rc('font',family = 'serif', serif = 'cmr10')\r\nfig, ax = plt.subplots()\r\n\r\nax.set_title('This is a special font:')\r\nax.set_xlabel(r'This is the default font $\\alpha\\beta\\gamma$')\r\nax.set_yticks([-1,0,1])\r\nplt.show()\r\n```\r\n\r\n![Figure_1](https://user-images.githubusercontent.com/24279776/78292576-7d31c280-74e4-11ea-9657-81d602684acf.png)\r\n\r\nOutput:\r\n\r\n```\r\nC:\\ProgramData\\Anaconda3\\lib\\site-packages\\matplotlib\\backends\\backend_agg.py:214: RuntimeWarning: Glyph 8722 missing from current font.\r\n  font.set_text(s, 0.0, flags=flags)\r\nC:\\ProgramData\\Anaconda3\\lib\\site-packages\\matplotlib\\backends\\backend_agg.py:183: RuntimeWarning: Glyph 8722 missing from current font.\r\n  font.set_text(s, 0, flags=flags)\r\n```\r\n\r\n**Expected outcome**\r\nCorrect rendering of symbols\r\n\r\n**Matplotlib version**\r\n\u003c!--Please specify your platform and versions of the relevant libraries you are using:--\u003e\r\n  * Operating system: Cygwin / Windows10 Enterprise 64 Bit\r\n  * Matplotlib version: 3.2.1\r\n  * Matplotlib backend (`print(matplotlib.get_backend())`):\r\n  * Python version: 3.7.7\r\n  * Jupyter version (if applicable): N/A\r\n  * Other libraries: \r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\nInstalled matplotlib via anaconda on default channel\r\n","author":{"url":"https://github.com/roussel-ryan","@type":"Person","name":"roussel-ryan"},"datePublished":"2020-04-02T19:25:08.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":11},"url":"https://github.com/17007/matplotlib/issues/17007"}