René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Specifying histtype='stepfilled' and normed=True when using plt.hist causes ymax to be set incorrectly","articleBody":"The combination of `histtype='stepfilled'` and `normed=True` seem to cause some problems with the max ylimit.\n\n``` python\nimport matplotlib.pyplot as plt\nimport seaborn.apionly as sns\niris = sns.load_dataset('iris')\n\nplt.figure()\nfor species, species_df in iris.groupby(\"species\"):\n    plt.hist(species_df[\"petal_length\"].values, normed=True, histtype=\"stepfilled\")\nplt.legend(sorted(iris.species.unique()))\n```\n\n![image](https://cloud.githubusercontent.com/assets/4560057/7525297/230b7ae6-f4d6-11e4-8738-5399fdd6f88f.png)\nWhich is not the case when only using `histtype='stepfilled'`.\n\n``` python\nplt.figure()\nfor species, species_df in iris.groupby(\"species\"):\n    plt.hist(species_df[\"petal_length\"].values, histtype=\"stepfilled\")\n```\n\n![image](https://cloud.githubusercontent.com/assets/4560057/7525309/3ed7bd66-f4d6-11e4-8f8a-e54677e7cc17.png)\nOr when only using `normed=True`.\n\n``` python\nplt.figure()\nfor species, species_df in iris.groupby(\"species\"):\n    plt.hist(species_df[\"petal_length\"].values, normed=True)\n```\n\n![image](https://cloud.githubusercontent.com/assets/4560057/7525319/53cfd0aa-f4d6-11e4-99ed-88667cea5db4.png)\nIt seems like in the erroneous case above, the max of the yaxis is set by the last plotted distribution, which can be tested by changing the order of when the different histograms are plotted.\n\n``` python\nplt.figure()\niris.loc[iris.species == 'setosa', 'species'] = 'wsetosa'\nfor species, species_df in iris.groupby(\"species\"):\n    plt.hist(species_df[\"petal_length\"].values, normed=True, histtype=\"stepfilled\")\nplt.legend(sorted(iris.species.unique()))\n```\n\n![image](https://cloud.githubusercontent.com/assets/4560057/7525328/6db22428-f4d6-11e4-8c03-84f65d4f9e72.png)\n","author":{"url":"https://github.com/joelostblom","@type":"Person","name":"joelostblom"},"datePublished":"2015-05-07T20:19:01.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/4414/matplotlib/issues/4414"}