{"id":836,"date":"2023-07-28T14:20:58","date_gmt":"2023-07-28T14:20:58","guid":{"rendered":"https:\/\/statorials.org\/de\/python-heatmap\/"},"modified":"2023-07-28T14:20:58","modified_gmt":"2023-07-28T14:20:58","slug":"python-heatmap","status":"publish","type":"post","link":"https:\/\/statorials.org\/de\/python-heatmap\/","title":{"rendered":"So erstellen sie ganz einfach heatmaps in python"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">Angenommen, wir haben den folgenden Datensatz in Python, der die Anzahl der Verk\u00e4ufe anzeigt, die ein bestimmtes Gesch\u00e4ft an jedem Wochentag f\u00fcnf Wochen lang get\u00e4tigt hat:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #107d3f;\">import<\/span> numpy <span style=\"color: #107d3f;\">as<\/span> np\n<span style=\"color: #107d3f;\">import <span style=\"color: #000000;\">pandas<\/span> as <span style=\"color: #000000;\">pd<\/span> \nimport<\/span> seaborn <span style=\"color: #107d3f;\">as<\/span> sns\n\n<span style=\"color: #008080;\">#create a dataset<\/span>\nnp.random.seed(0)\ndata = {'day': np.tile(['Mon', 'Tue', 'Wed', 'Thur', 'Fri'], 5),\n        'week': np.repeat([1, 2, 3, 4, 5], 5),\n        'sales': np.random.randint(0, 50, size=25)\n        }\n\ndf = pd.DataFrame(data,columns=['day','week','sales'])\ndf = df.pivot('day', 'week', 'sales')\n\n<span style=\"color: #008080;\">view first ten rows of dataset\n<\/span>df[:10]\n\nweek 1 2 3 4 5\nday\t\t\t\t\t\nFri 3 36 12 46 13\nMy 44 39 23 1 24\nThursday 3 21 24 23 25\nKills 47 9 6 38 17\nWed 0 19 24 39 37\n<\/strong><\/pre>\n<h3> <span style=\"color: #000000;\"><strong>Erstellen Sie eine einfache Heatmap<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mit der Funktion <strong>ns.heatmap()<\/strong> k\u00f6nnen wir eine einfache Heatmap erstellen:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>sns.heatmap(df)<\/strong><\/span> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9253 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/heatmap_python1.png\" alt=\"Heatmap in Python\" width=\"400\" height=\"296\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Die Farbleiste auf der rechten Seite zeigt eine Legende mit den durch die verschiedenen Farben dargestellten Werten an.<\/span><\/p>\n<h3> <span style=\"color: #000000;\"><strong>F\u00fcgen Sie der Heatmap Linien hinzu<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Mit dem Argument <strong>linewidths<\/strong> k\u00f6nnen Sie Linien zwischen Quadraten in der Heatmap hinzuf\u00fcgen:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>sns.heatmap(df, linewidths=.5)<\/strong><\/span> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9255 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/heatmap_python2.png\" alt=\"Marine-Python-Heatmap\" width=\"402\" height=\"294\" srcset=\"\" sizes=\"\"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>F\u00fcgen Sie der Heatmap Anmerkungen hinzu<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Sie k\u00f6nnen der Heatmap auch Anmerkungen hinzuf\u00fcgen, indem Sie das Argument <strong>annot=True<\/strong> verwenden:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>sns.heatmap(df, linewidths=.5, annot=True)<\/strong><\/span> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9256 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/heatmap_python3.png\" alt=\"In Python kommentierte W\u00e4rmekarte\" width=\"401\" height=\"293\" srcset=\"\" sizes=\"\"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>Heatmap-Farbleiste ausblenden<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Sie k\u00f6nnen die Farbleiste auch vollst\u00e4ndig ausblenden, indem Sie die Option <strong>cbar=False<\/strong> verwenden:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <span style=\"color: #000000;\"><strong>sns.heatmap(df, linewidths=.5, annot=True, cbar=False)<\/strong><\/span> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9257 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/heatmap_python4.png\" alt=\"Heatmap-Beispiel in Python\" width=\"399\" height=\"274\" srcset=\"\" sizes=\"\"><\/p>\n<h3> <span style=\"color: #000000;\"><strong>\u00c4ndern Sie das Farbthema der Heatmap<\/strong><\/span><\/h3>\n<p> <span style=\"color: #000000;\">Sie k\u00f6nnen das Farbthema auch mit dem Argument <strong>cmap<\/strong> \u00e4ndern. Beispielsweise k\u00f6nnen Sie die Farben so einstellen, dass sie von Gelb \u00fcber Gr\u00fcn bis Blau reichen:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sns.heatmap(df, cmap='YlGnBu')\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9258 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/heatmap_python5.png\" alt=\"Python-Heatmap\" width=\"403\" height=\"287\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\">Oder Sie k\u00f6nnten die Farben von Rot nach Blau \u00e4ndern:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong>sns.heatmap(df, cmap='RdBu')<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-9259 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/heatmap_python6.png\" alt=\"Heatmap mit unterschiedlichem cmap in Python\" width=\"400\" height=\"292\" srcset=\"\" sizes=\"\"><\/p>\n<p> <span style=\"color: #000000;\"><em>Eine vollst\u00e4ndige Liste der Farbpaletten finden Sie in der <a href=\"https:\/\/matplotlib.org\/3.1.0\/tutorials\/colors\/colormaps.html\" target=\"_blank\" rel=\"noopener noreferrer\">Matplotlib-Dokumentation<\/a> .<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Angenommen, wir haben den folgenden Datensatz in Python, der die Anzahl der Verk\u00e4ufe anzeigt, die ein bestimmtes Gesch\u00e4ft an jedem Wochentag f\u00fcnf Wochen lang get\u00e4tigt hat: import numpy as np import pandas as pd import seaborn as sns #create a dataset np.random.seed(0) data = {&#8218;day&#8216;: np.tile([&#8218;Mon&#8216;, &#8218;Tue&#8216;, &#8218;Wed&#8216;, &#8218;Thur&#8216;, &#8218;Fri&#8216;], 5), &#8218;week&#8216;: np.repeat([1, 2, 3, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - 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