René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Theme properties are not properly forwarded to xkcd plot","articleBody":"### Bug summary\r\n\r\nSome theme properties are not properly forwarded to `xkcd` plot.\r\n\r\nAlso, the displayed figure is not identical to the one saved.\r\n\r\n### Code for reproduction\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nimport numpy as np\r\nfrom matplotlib import patheffects\r\n\r\nplt.style.use([\"dark_background\"])\r\n\r\n\r\ndef make_figure():\r\n    fig = plt.figure()\r\n    ax = fig.add_axes((0.1, 0.2, 0.8, 0.7))\r\n    ax.spines[[\"top\", \"right\"]].set_visible(False)\r\n    ax.set_xticks([])\r\n    ax.set_yticks([])\r\n    ax.set_ylim([-30, 10])\r\n\r\n    data = np.ones(100)\r\n    data[70:] -= np.arange(30)\r\n\r\n    ax.annotate(\r\n        \"THE DAY I REALIZED\\nI COULD COOK BACON\\nWHENEVER I WANTED\",\r\n        xy=(70, 1),\r\n        arrowprops=dict(arrowstyle=\"-\u003e\"),\r\n        xytext=(15, -10),\r\n    )\r\n\r\n    ax.plot(data)\r\n\r\n    ax.set_xlabel(\"time\")\r\n    ax.set_ylabel(\"my overall health\")\r\n    fig.text(0.5, 0.05, '\"Stove Ownership\" from xkcd by Randall Munroe', ha=\"center\")\r\n\r\n\r\nwith plt.xkcd():\r\n    # This figure will be in XKCD-style\r\n    make_figure()\r\n    # ...\r\n\r\n# This figure will be in regular style\r\nmake_figure()\r\n\r\nplt.show()\r\n```\r\n\r\n\r\n### Actual outcome\r\n\r\n# Shown figures\r\n![image](https://github.com/matplotlib/matplotlib/assets/48522112/5487583c-c028-4823-a739-bcf629644001)\r\n\r\n\r\n# Saved figures\r\n![xkcd_fig](https://github.com/matplotlib/matplotlib/assets/48522112/58f9eb8b-9671-4cfa-b15a-7b0b756445cf)\r\n![regular_fig](https://github.com/matplotlib/matplotlib/assets/48522112/9e1fd188-4c18-4adc-96fb-f4d148300d1e)\r\n\r\n\r\n### Expected outcome\r\n\r\nBy updating the relevant `rcparams` _**after**_ the `plt.xkcd()` call, I can update the figure properly :\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\nimport numpy as np\r\nfrom matplotlib import patheffects\r\n\r\nplt.style.use([\"dark_background\"])\r\n\r\n\r\ndef make_figure(type):\r\n    fig = plt.figure()\r\n    ax = fig.add_axes((0.1, 0.2, 0.8, 0.7))\r\n    ax.spines[[\"top\", \"right\"]].set_visible(False)\r\n    ax.set_xticks([])\r\n    ax.set_yticks([])\r\n    ax.set_ylim([-30, 10])\r\n\r\n    data = np.ones(100)\r\n    data[70:] -= np.arange(30)\r\n\r\n    ax.annotate(\r\n        \"THE DAY I REALIZED\\nI COULD COOK BACON\\nWHENEVER I WANTED\",\r\n        xy=(70, 1),\r\n        arrowprops=dict(arrowstyle=\"-\u003e\"),\r\n        xytext=(15, -10),\r\n    )\r\n\r\n    ax.plot(data)\r\n\r\n    ax.set_xlabel(\"time\")\r\n    ax.set_ylabel(\"my overall health\")\r\n    fig.text(0.5, 0.05, f\"{type} type of figure\", ha=\"center\")\r\n\r\n\r\nwith plt.xkcd():\r\n    # This figure will be in XKCD-style\r\n    plt.rcParams[\"path.effects\"] = [patheffects.withStroke(linewidth=0)]\r\n    plt.rcParams[\"figure.facecolor\"] = \"black\"\r\n    plt.rcParams[\"axes.edgecolor\"] = \"white\"\r\n    make_figure(\"xkcd\")\r\n    # ...\r\nplt.savefig(\"xkcd_fig.png\")\r\n\r\n# This figure will be in regular style\r\nmake_figure(\"regular\")\r\nplt.savefig(\"regular_fig.png\")\r\n\r\n\r\nplt.show()\r\n```\r\n\r\n# shown figures\r\n![image](https://github.com/matplotlib/matplotlib/assets/48522112/84e9b884-aa05-47ac-af65-d1dc707f166c)\r\n\r\n# saved figures\r\n![regular_fig](https://github.com/matplotlib/matplotlib/assets/48522112/8ffa8ee0-7d62-4b07-b8a0-2577a9b12250)\r\n![xkcd_fig](https://github.com/matplotlib/matplotlib/assets/48522112/024b4db8-3840-4568-8b16-6929b4928c5b)\r\n\r\nEDIT: moving the `plt.style.use(\"dark_background\")` result in a mix between the `rcparams` of the used style, and the ones imposed by `xkcd`:\r\n\r\n```\r\nwith plt.xkcd():\r\n    plt.style.use([\"dark_background\"])\r\n    # This figure will be in XKCD-style\r\n    make_figure(\"xkcd_black\")\r\n    # ...\r\nplt.savefig(\"xkcd_fig.png\")\r\n```\r\n![xkcd_fig](https://github.com/matplotlib/matplotlib/assets/48522112/fddf8e0c-bc8b-4f67-a76f-a52c68086d3c)\r\n\r\n\r\n### Additional information\r\n\r\nBased on this [issue](https://stackoverflow.com/questions/50845646/matplotlib-xkcd-and-black-figure-background) on stackoverflow.\r\n\r\n### Operating system\r\n\r\nUbuntu 22.04\r\n\r\n### Matplotlib Version\r\n\r\n3.8.2\r\n\r\n### Matplotlib Backend\r\n\r\nQTAgg\r\n\r\n### Python version\r\n\r\n3.10.12\r\n\r\n### Jupyter version\r\n\r\n_No response_\r\n\r\n### Installation\r\n\r\npip","author":{"url":"https://github.com/cgadal","@type":"Person","name":"cgadal"},"datePublished":"2024-02-14T14:08:25.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/27791/matplotlib/issues/27791"}