René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Computing space needed for figure legend when using tight_layout","articleBody":"The use case it to place a figure legend below a grid of subplots, while also using `tight_layout()` to adjust the spacing between the subplots. This is possible using this code example, where `LEGEND_HEIGHT` must be set to the fraction of figure height used by the figure:\r\n\r\n```python\r\nimport collections\r\nimport matplotlib.pyplot as plt\r\nimport numpy as np\r\n\r\nLEGEND_HEIGHT = 0.05\r\n\r\n# Create figure with a grid of plots and random data.\r\nfig, axes = plt.subplots(5, 5, figsize=(10, 8))\r\nfor ax in axes.flatten():\r\n  ax.plot(np.cumsum(np.random.uniform(-1, 1, 100)), label='Line')\r\n\r\n# Collect legend labels from all plots.\r\nentries = collections.OrderedDict()\r\nfor ax in axes.flatten():\r\n  for handle, label in zip(*ax.get_legend_handles_labels()):\r\n    entries[label] = handle\r\n\r\n# Adjust spacing between plots and make space for legend.\r\nfig.tight_layout(rect=(0, LEGEND_HEIGHT, 1, 1), h_pad=0.5, w_pad=0.5)\r\n\r\n# Add legend below the grid of plots.\r\nlegend = fig.legend(\r\n    entries.values(), entries.keys(),\r\n    loc='upper center', bbox_to_anchor=(0.5, LEGEND_HEIGHT))\r\n\r\nfig.savefig('figure.png')\r\n```\r\n\r\n![figure](https://user-images.githubusercontent.com/2111293/64800028-d55aa480-d553-11e9-8e59-ce84a94f4e3e.png)\r\n\r\nHowever, the number of subplots in the grid entries and entries in the legend frequently changes for me. Right now, this requires a lot of time for manually tuning `LEGEND_HEIGHT` to a suitable value. Does Matplotlib allow for an automatic solution here?","author":{"url":"https://github.com/danijar","@type":"Person","name":"danijar"},"datePublished":"2019-09-12T15:56:11.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/15257/matplotlib/issues/15257"}