René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: Units behavior of `tri*` methods","articleBody":"### Bug summary\n\nAs seen in #27491, #27488, #27494, #27487\r\n\r\nIt appears that the `tri*` methods _do not_ actually properly handle units.\n\n### Code for reproduction\n\n```python\nfig, ax = plt.subplots()\r\nnp.random.seed(19680801)\r\nlimit_value = 30\r\n\r\nstartdate = np.datetime64(\"2023-12-01\")\r\n\r\nx_dates = startdate + np.random.randint(0, 15, size=(limit_value-1,)).astype(\"timedelta64[D]\")\r\ny_dates = startdate + np.random.randint(0, 15,size=(limit_value-1,)).astype(\"timedelta64[D]\")\r\n\r\nx_dates_converted = mpl.dates.date2num(x_dates)\r\n\r\ny_data = np.random.rand(limit_value - 1)\r\n\r\nz_data = np.sin(x_dates_converted) + np.cos(y_data)\r\n\r\nax.triplot(x_dates, y_dates)\r\nax.tripcolor(x_dates, y_dates, z_data)\r\n#ax.tricontour(x_dates, y_dates, z_data)\r\n#ax.tricontourf(x_dates, y_dates, z_data)\n```\n\n\n### Actual outcome\n\nPrior to (probably, though I didn't actually bisect it) #24522, the code would actually error, as it attempted to cast the x/y arrays to float64 arrays.\r\n\r\nNow it will actually work to plot (seemingly even getting the actual values converted, though now that I think about it not sure _where_... my guess is that it is actually coincidental that they are `datetime64[D]` dtype which _happens_ to be the same scale/epoch as mpl, but it is not actually being properly converted) however it does _not_ set the Formatters/etc.\n\n### Expected outcome\n\nUnits are set properly (including axisinfo such as formatters).\n\n### Additional information\n\n_No response_\n\n### Operating system\n\n_No response_\n\n### Matplotlib Version\n\n3.9.0.dev821+gfa6be74127 (~main currently)\n\n### Matplotlib Backend\n\n_No response_\n\n### Python version\n\n_No response_\n\n### Jupyter version\n\n_No response_\n\n### Installation\n\ngit checkout","author":{"url":"https://github.com/ksunden","@type":"Person","name":"ksunden"},"datePublished":"2023-12-12T00:49:42.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/27499/matplotlib/issues/27499"}