René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: `secondary_xaxis` produces ticks at incorrect locations","articleBody":"### Bug summary\n\nIt is possible I'm doing this incorrectly, but for a very simple example `secondary_xaxis` puts tick marks at incorrect locations. Modifying slightly the interpolation example from here https://matplotlib.org/stable/gallery/subplots_axes_and_figures/secondary_axis.html:\n\n### Code for reproduction\n\n```Python\nfig, ax = plt.subplots(constrained_layout=True)\r\nxdata = np.arange(0, 11, 0.4)\r\nydata = np.random.randn(len(xdata))\r\nax.plot(xdata, ydata, label='Plotted data')\r\nax.set_xlabel('X [m]')\r\nax.legend()\r\nxnew = xdata**2\r\n\r\n\r\ndef forward(x):\r\n    return np.interp(x, xdata, xnew)\r\n\r\n\r\ndef inverse(x):\r\n    return np.interp(x, xnew, xdata)\r\n\r\nsecax = ax.secondary_xaxis('top', functions=(forward, inverse))\r\nsecax.xaxis.set_minor_locator(AutoMinorLocator())\r\nsecax.set_xlabel('$X_{other}$')\r\n\r\nplt.show()\n```\n\n\n### Actual outcome\n\n\u003cimg width=\"627\" alt=\"image\" src=\"https://github.com/user-attachments/assets/cb45f32e-4f53-4f6a-ad9d-4eed2c948c35\"\u003e\r\n\n\n### Expected outcome\n\nNotice that e.g. 0 on the lower axis is not aligned with 0 on the top and 10 on the bottom is not aligned with 100 on the top.\n\n### Additional information\n\n_No response_\n\n### Operating system\n\nOS/X\n\n### Matplotlib Version\n\n3.9.2\n\n### Matplotlib Backend\n\nmodule://matplotlib_inline.backend_inline\n\n### Python version\n\n3.10.14\n\n### Jupyter version\n\n7.2.2\n\n### Installation\n\npip","author":{"url":"https://github.com/dkweiss31","@type":"Person","name":"dkweiss31"},"datePublished":"2024-11-04T14:34:54.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":9},"url":"https://github.com/29067/matplotlib/issues/29067"}