René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"fill_between interpolation \u0026 nan issue","articleBody":"The issue was discovered here\r\nhttps://github.com/deeptools/pyGenomeTracks/pull/37\r\n\r\nBasically, when fill_between encounters a NaN in the y values, when interpolate=True it produces a strange output.\r\n\r\nThis is without interpolation:\r\n```python\r\nimport matplotlib.pyplot as plt\r\nimport numpy as np\r\n\r\nx = np.arange(107).astype(float)\r\ny = np.append(np.zeros((100))+0.01, [0.5, 0.75, 1, np.nan, 1, 0.75, 0.5])\r\n\r\nplt.figure(figsize=(20, 5))\r\nplt.fill_between(x, y, interpolate=False)\r\n```\r\n\r\n![image](https://user-images.githubusercontent.com/2895034/43317242-079e7dfe-9194-11e8-93db-546bbcd8aea6.png)\r\n\r\nIf I turn interpolation on (which I wouldn't expect to do anything in this case, since there are not zero crossings), this is what I get:\r\n\r\n```python\r\nplt.figure(figsize=(20, 5))\r\nplt.fill_between(x, y, interpolate=True)\r\n```\r\n![image](https://user-images.githubusercontent.com/2895034/43317297-346859f4-9194-11e8-9fb5-0978cf04a9c1.png)\r\n\r\nEven if I am misunderstanding something about how interpolation is supposed to work, clearly this is not what it should do...\r\n\r\nmpl 2.1.2, python 3.5.2","author":{"url":"https://github.com/Phlya","@type":"Person","name":"Phlya"},"datePublished":"2018-07-27T10:58:54.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":16},"url":"https://github.com/11781/matplotlib/issues/11781"}