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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[Bug]: array-like linewidth raises an error for scatter3D","articleBody":"### Bug summary\r\n\r\nThe documentation says that `linewidths` can be `float or array-like` and it defaults to 1.5, but passing an array-like leads to an error\r\n\r\n### Code for reproduction\r\n\r\n```python\r\nimport matplotlib.pyplot as plt\r\n\r\nfig = plt.figure()\r\nax = fig.add_subplot(projection='3d')\r\nx = range(1, 10)\r\nax.scatter(x, x, x, marker='o', s=x, linewidth=x)\r\nplt.show()\r\n```\r\n\r\n\r\n### Actual outcome\r\n\r\nException:\r\n\r\n```\r\nmpl_toolkits/mplot3d/axes3d.py in do_3d_projection(artist)\r\n    469                     # avoid passing it to them; call this directly once the\r\n    470                     # deprecation has expired.\r\n--\u003e 471                     return artist.do_3d_projection()\r\n    472 \r\n    473                 _api.warn_deprecated(\r\n\r\nmatplotlib/_api/deprecation.py in wrapper(*inner_args, **inner_kwargs)\r\n    429                          else deprecation_addendum,\r\n    430                 **kwargs)\r\n--\u003e 431         return func(*inner_args, **inner_kwargs)\r\n    432 \r\n    433     return wrapper\r\n\r\nmpl_toolkits/mplot3d/art3d.py in do_3d_projection(self, renderer)\r\n    615 \r\n    616         if len(self._linewidths3d) \u003e 1:\r\n--\u003e 617             self._linewidths = self._linewidths3d[z_markers_idx]\r\n    618 \r\n    619         # Re-order items\r\n\r\nTypeError: only integer scalar arrays can be converted to a scalar index\r\n```\r\n\r\ngets raised, from:\r\n\r\nhttps://github.com/matplotlib/matplotlib/blob/0d433b4bf20bfc564400f35ce9709f7596e0e5f6/lib/mpl_toolkits/mplot3d/art3d.py#L599-L603\r\n\r\nThis is because the type of `self._sizes3d` is `numpy.ndarray`, but type of `self._linewidths3d` is `list`.\r\n\r\n### Expected outcome\r\n\r\nArray-like linewidth works for 3d plots as it does for 2d plots.\r\n\r\n### Additional information\r\n\r\n- `ax.scatter(x, x, x, marker='o', s=x)` works fine.\r\n- `linewidths` is a list regardless of user input type.\r\n- I don't know where linewidths gets converted to a list, but a quick fix is as simple as wrapping it in `np.array` call: `self._linewidths = np.array(self._linewidths3d)[z_markers_idx]` (tested that this fixes the issue).\r\n\r\n### Operating system\r\n\r\n_No response_\r\n\r\n### Matplotlib Version\r\n\r\n3.5.2 but also happens with older versions (3.3.x)\r\n\r\n### Matplotlib Backend\r\n\r\n_No response_\r\n\r\n### Python version\r\n\r\n_No response_\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/krassowski","@type":"Person","name":"krassowski"},"datePublished":"2022-07-16T11:21:27.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/23433/matplotlib/issues/23433"}