René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"'bottom cannot be \u003e= top' when using `tight_layout`","articleBody":"I'm trying to understand why sometimes I get a `ValueError` when using `tight_layout`.\n\nThe code of `matplotlib` is too complicated for me, but I'm trying to see what's happening using `pdb`.\n\nIt seems that the problem comes from what `get_tight_layout_figure` returns:\n\n```\n(Pdb) l\n379                                              subplot_list=subplot_list,\n380                                              ax_bbox_list=ax_bbox_list,\n381                                              pad=pad, h_pad=h_pad, w_pad=w_pad,\n382                                              rect=(left, bottom, right, top))\n383  \n384  -\u003e     return kwargs\n(Pdb) p kwargs\n{'top': 0.43099934895833336, 'right': 0.97750000000000004, 'bottom': 0.56900065104166675, 'left': 0.16939941406250003}\n```\n\nI guess this in turns comes from what happens in `auto_adjust_subplotpars`, in the output of `_get_bottom` and `_get_top`:\n\n```\n(Pdb) p ax_bbox.ymin\n0.3716666666666667\n(Pdb) p tight_bbox.ymin\n-0.16733398437499999\n(Pdb) p ax_bbox.ymin - tight_bbox.ymin\n0.53900065104166672\n(Pdb) p tight_bbox.ymax\n1.1673339843749999\n(Pdb) p ax_bbox.ymax\n0.6283333333333333\n(Pdb) p tight_bbox.ymax - ax_bbox.ymax\n0.53900065104166661\n```\n\nI don't know what `ax_bbox` and `tight_bbox` exactly are.\n\nI just guess the algorithm to determine the figure properties do not play well with the data I want to plot. Can this be considered a bug ?\n","author":{"url":"https://github.com/blaiseli","@type":"Person","name":"blaiseli"},"datePublished":"2015-11-10T09:43:09.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":19},"url":"https://github.com/5456/matplotlib/issues/5456"}