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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Matplotlib font error for negative data","articleBody":"### Bug summary\n\nWhen using a combination of text.usetex: True, font.family: 'serif', font.serif = 'Times', attempting to plot negative data results in a LookupError of the required font\n\n### Code for reproduction\n\n```Python\nimport matplotlib.pyplot as plt\r\n\r\nplt.rcParams['text.usetex'] = True\r\nplt.rcParams['font.family'] = 'serif'\r\nplt.rcParams['font.serif'] = 'Times'\r\n\r\nfig, ax = plt.subplots()\r\nax.plot([-1, 2, 3])\r\nfig.savefig('test.pdf')\n```\n\n\n### Actual outcome\n\nLookupError: An associated PostScript font (required by Matplotlib) could not be found for TeX font 'zptmcm7y' in 'C:/Users/XXX/AppData/Local/MiKTeX/fonts/map/pdftex/pdftex.map'; this problem can often be solved by installing a suitable PostScript font package in your TeX package manager\n\n### Expected outcome\n\nA plot with the data in tex font\n\n### Additional information\n\nInstalling or re-installing a postscript font package using MikTeX did not solve the issue\n\n### Operating system\n\nWindows 10\n\n### Matplotlib Version\n\n3.9.2\n\n### Matplotlib Backend\n\nmodule://backend_interagg\n\n### Python version\n\n3.12.1\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\npip","author":{"url":"https://github.com/JeltevL","@type":"Person","name":"JeltevL"},"datePublished":"2024-09-27T07:54:07.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/28898/matplotlib/issues/28898"}