René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Histogram ignores `lw` argument, no warning or error","articleBody":"### Bug summary\n\n`ax.hist` ignores `lw` argument. Must use `linewidth` in order to change the thickness of the lines.\n\n### Code for reproduction\n\n```Python\n# Test of lw vs linewidth in histograms\n\nhistogram1 = [1]\nhistogram2 = [3]\nhistogram3 = [5]\n\nfig, ax = plt.subplots(figsize=(8, 8))\nax.hist(histogram1, bins=1, density=True, histtype='step', color='tab:blue', lw=1, label='lw=1')\nax.hist(histogram2, bins=1, density=True, histtype='step', color='tab:orange', lw=3, label='lw=3')\nax.hist(histogram3, bins=1, density=True, histtype='step', color='tab:green', linewidth=3, label='linewidth=3')\nax.legend()\n\nplt.show()\n\nprint(matplotlib.__version__)\n```\n\n### Actual outcome\n\n![Image](https://github.com/user-attachments/assets/9e0e6351-b0a3-48b2-b4b2-53f9407d543c)\n\n### Expected outcome\n\nUsing `lw` and `linewidth` produce same output.\n\n### Additional information\n\nThis was not a problem with an earlier version of Matplotlib (don't remember the version unfortunately, but definitely 3.x something).\n\n### Operating system\n\nUbuntu 24.04.2 LTS\n\n### Matplotlib Version\n\n3.10.0\n\n### Matplotlib Backend\n\nagg\n\n### Python version\n\n3.12.3\n\n### Jupyter version\n\n4.2.5\n\n### Installation\n\npip","author":{"url":"https://github.com/gullbrekken","@type":"Person","name":"gullbrekken"},"datePublished":"2025-04-28T09:58:17.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/29977/matplotlib/issues/29977"}