René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"connectionstyle arc3 with high rad value pushes up data interval of x-axis and y-axis.","articleBody":"I am a hobbyist learning what python can do (and I am enjoying how much python can do!).\r\n\r\nWhen drawing a circular `networkx` graph, that has arc3 `connectionstyle` edges, I noticed that the graph \"shrank\" when I set a high value for _rad_. Looking deeper, the graph had not shrunk. The x-axis and y-axis had lengthened.\r\n\r\nPlease refer to the graphs plotted by the code below.\r\n\r\nI started with the top-left graph ('low-rad' of 0.5 and not having to set_ylim).\r\n\r\nThe top-right graph is the graph that 'shrank' when  _rad_ was set 'high' (rad=1).\r\n\r\nNext, I manually set_ylim for the bottom two graphs.\r\n\r\nThe bottom-left graph looks like the top-left graph (I estimated the values for the _ylim_ so that they look similar).\r\n\r\nThe bottom-right graph shows the intended 'high-rad' graph (the edges are high-arched).\r\n\r\nNotice the axis ticks of each graph and compare the graphs' x-axis and y-axis data intervals. This suggests that matplotlib treats the 'high-rad' graphs as bigger than how human sees it. If the ticks were not there, I would not have known that the axis had lengthened (`networkx` switches off the ticks for x-axis and y-axis).\r\n\r\nThe expected outcome is the graph in the bottom right, **without** having to set (y-)axis limit (and without axis ticks).\r\n\r\nI am using python 3.7.7 and matpotlib 3.2.2.\r\n\r\nThank you.\r\n\r\n```\r\nimport networkx as nx\r\nimport matplotlib.pyplot as plt\r\n\r\nshop_journey = [(1,2,3,4,5,6,7,8,9,10,11,12),(1,7),(7,1)]\r\n\r\nG = nx.MultiDiGraph()\r\nfor journey in shop_journey:\r\n    if len(journey) \u003e 1:\r\n        nx.add_path(G,journey)\r\n\r\ndef circle_pattern(ax,connectionstyle,bottom,top):\r\n    pos=nx.circular_layout(G)\r\n    nx.draw_networkx(\r\n        G,\r\n        pos=pos,\r\n        connectionstyle=connectionstyle,\r\n        ax=ax\r\n    )\r\n    ax.axis('equal')\r\n    y1,y2 = tuple(ax.yaxis.get_data_interval())\r\n    x1,x2 = tuple(ax.xaxis.get_data_interval())\r\n    title='{}\\nX-axis data interval: {},{}\\nY-axis data interval: {},{}\\nY-limits: {},{}'.format(\r\n        connectionstyle,\r\n        round(x1,1),round(x2,1),\r\n        round(y1,1),round(y2,1),\r\n        bottom,top\r\n    )\r\n    ax.set_title(label=title)\r\n    ax.set_ylim(bottom,top)\r\n    ax.tick_params(left=True,bottom=True,labelleft=True,labelbottom=True)\r\n\r\nfig,axs = plt.subplots(2,2,figsize=(9,9))\r\ncircle_pattern(axs[0,0],\"arc3,rad=0.5\",None,None)\r\ncircle_pattern(axs[0,1],\"arc3,rad=1\",None,None)\r\ncircle_pattern(axs[1,0],\"arc3,rad=0.5\",-1.5,1.5)\r\ncircle_pattern(axs[1,1],\"arc3,rad=1\",-1.5,1.5)\r\nplt.subplots_adjust(hspace=0.9)\r\nplt.show()\r\n```","author":{"url":"https://github.com/rchee2018","@type":"Person","name":"rchee2018"},"datePublished":"2020-12-26T12:48:03.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/19174/matplotlib/issues/19174"}