{"id":4155,"date":"2023-07-13T05:53:17","date_gmt":"2023-07-13T05:53:17","guid":{"rendered":"https:\/\/statorials.org\/nl\/pandas-histogrampercentage\/"},"modified":"2023-07-13T05:53:17","modified_gmt":"2023-07-13T05:53:17","slug":"pandas-histogrampercentage","status":"publish","type":"post","link":"https:\/\/statorials.org\/nl\/pandas-histogrampercentage\/","title":{"rendered":"Hoe het percentage op de y-as van het panda-histogram wordt weergegeven"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">U kunt de volgende basissyntaxis gebruiken om percentages op de y-as van een panda-histogram weer te geven:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n<span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n<span style=\"color: #008000;\">import<\/span> matplotlib. <span style=\"color: #3366ff;\">pyplot<\/span> <span style=\"color: #008000;\">as<\/span> plt\n<span style=\"color: #008000;\">from<\/span> matplotlib. <span style=\"color: #3366ff;\">ticker<\/span> <span style=\"color: #008000;\">import<\/span> PercentFormatter\n\n<span style=\"color: #008080;\">#create histogram, using percentages instead of counts<\/span>\nplt. <span style=\"color: #3366ff;\">hist<\/span> (df[' <span style=\"color: #ff0000;\">my_column<\/span> '], weights= <span style=\"color: #3366ff;\">np.ones<\/span> ( <span style=\"color: #008000;\">len<\/span> (df)) \/ <span style=\"color: #008000;\">len<\/span> (df))\n\n<span style=\"color: #008080;\">#apply percentage format to y-axis\n<\/span>plt. <span style=\"color: #3366ff;\">gca<\/span> (). <span style=\"color: #3366ff;\">yaxis<\/span> . <span style=\"color: #3366ff;\">set_major_formatter<\/span> (PercentFormatter(1))\nplt. <span style=\"color: #3366ff;\">show<\/span> ()\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Het volgende voorbeeld laat zien hoe u deze syntaxis in de praktijk kunt gebruiken.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Voorbeeld: Toon het percentage op de Y-as van het Panda-histogram<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Stel dat we het volgende panda&#8217;s DataFrame hebben dat informatie bevat over verschillende basketbalspelers:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> pandas <span style=\"color: #008000;\">as<\/span> pd\n<span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n<span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008080;\">\n#make this example reproducible\n<\/span>n.p. <span style=\"color: #3366ff;\">random<\/span> . <span style=\"color: #3366ff;\">seeds<\/span> (1)\n\n<span style=\"color: #008080;\">#createDataFrame\n<\/span>df = pd. <span style=\"color: #3366ff;\">DataFrame<\/span> ({' <span style=\"color: #ff0000;\">points<\/span> ': np. <span style=\"color: #3366ff;\">random<\/span> . <span style=\"color: #3366ff;\">normal<\/span> (loc=20, scale=2, size=300),\n                   ' <span style=\"color: #ff0000;\">assists<\/span> ': np. <span style=\"color: #3366ff;\">random<\/span> . <span style=\"color: #3366ff;\">normal<\/span> (loc=14, scale=3, size=300),\n                   ' <span style=\"color: #ff0000;\">rebounds<\/span> ': np. <span style=\"color: #3366ff;\">random<\/span> . <span style=\"color: #3366ff;\">normal<\/span> (loc=12, scale=1, size=300)})\n\n<span style=\"color: #008080;\">#view head of DataFrame\n<\/span><span style=\"color: #008000;\">print<\/span> ( <span style=\"color: #3366ff;\">df.head<\/span> ())\n\n      points assists rebounds\n0 23.248691 20.197350 10.927036\n1 18.776487 9.586529 12.495159\n2 18.943656 11.509484 11.047938\n3 17.854063 11.358267 11.481854\n4 21.730815 13.162707 10.538596\n<\/span><\/span><\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Als we een histogram maken om de verdeling van waarden in de <strong>puntenkolom<\/strong> te visualiseren, toont de y-as standaard de tellingen:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\"><span style=\"color: #000000;\"><span style=\"color: #008000;\">import<\/span> matplotlib. <span style=\"color: #3366ff;\">pyplot<\/span> <span style=\"color: #008000;\">as<\/span> plt \n\n<span style=\"color: #008080;\">#create histogram for points columb\n<\/span>plt. <span style=\"color: #3366ff;\">hist<\/span> (df[' <span style=\"color: #ff0000;\">points<\/span> '], edgecolor=' <span style=\"color: #ff0000;\">black<\/span> ')\n<\/span><\/span><\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\" wp-image-32991 aligncenter\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pourcentage1.png\" alt=\"\" width=\"515\" height=\"388\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Om in plaats daarvan percentages op de y-as weer te geven, kunnen we de functie <strong>PercentFormatter<\/strong> gebruiken:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n<span style=\"color: #008000;\">import<\/span> matplotlib. <span style=\"color: #3366ff;\">pyplot<\/span> <span style=\"color: #008000;\">as<\/span> plt\n<span style=\"color: #008000;\">from<\/span> matplotlib. <span style=\"color: #3366ff;\">ticker<\/span> <span style=\"color: #008000;\">import<\/span> PercentFormatter\n\n<span style=\"color: #008080;\">#create histogram, using percentages instead of counts<\/span>\nplt. <span style=\"color: #3366ff;\">hist<\/span> (df[' <span style=\"color: #ff0000;\">points<\/span> '], weights=np. <span style=\"color: #3366ff;\">ones<\/span> ( <span style=\"color: #008000;\">len<\/span> (df)) \/ <span style=\"color: #008000;\">len<\/span> (df), edgecolor=' <span style=\"color: #ff0000;\">black<\/span> ')\n\n<span style=\"color: #008080;\">#apply percentage format to y-axis\n<\/span>plt. <span style=\"color: #3366ff;\">gca<\/span> (). <span style=\"color: #3366ff;\">yaxis<\/span> . <span style=\"color: #3366ff;\">set_major_formatter<\/span> (PercentFormatter(1))\nplt. <span style=\"color: #3366ff;\">show<\/span> ()<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-32992\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pourcentage2.png\" alt=\"panda-histogram met percentage op y-as\" width=\"521\" height=\"377\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Merk op dat de Y-as nu percentages weergeeft.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Als u decimalen uit percentages wilt verwijderen, gebruikt u eenvoudig het argument <strong>decimals=0<\/strong> in de functie <strong>PercentFormatter()<\/strong> :<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> numpy <span style=\"color: #008000;\">as<\/span> np\n<span style=\"color: #008000;\">import<\/span> matplotlib. <span style=\"color: #3366ff;\">pyplot<\/span> <span style=\"color: #008000;\">as<\/span> plt\n<span style=\"color: #008000;\">from<\/span> matplotlib. <span style=\"color: #3366ff;\">ticker<\/span> <span style=\"color: #008000;\">import<\/span> PercentFormatter\n\n<span style=\"color: #008080;\">#create histogram, using percentages instead of counts<\/span>\nplt. <span style=\"color: #3366ff;\">hist<\/span> (df[' <span style=\"color: #ff0000;\">points<\/span> '], weights=np. <span style=\"color: #3366ff;\">ones<\/span> ( <span style=\"color: #008000;\">len<\/span> (df)) \/ <span style=\"color: #008000;\">len<\/span> (df), edgecolor=' <span style=\"color: #ff0000;\">black<\/span> ')\n\n<span style=\"color: #008080;\">#apply percentage format to y-axis\n<\/span>plt. <span style=\"color: #3366ff;\">gca<\/span> (). <span style=\"color: #3366ff;\">yaxis<\/span> . <span style=\"color: #3366ff;\">set_major_formatter<\/span> (PercentFormatter(1, decimals= <span style=\"color: #008000;\">0<\/span> ))\nplt. <span style=\"color: #3366ff;\">show<\/span> ()<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-32993\" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pourcentage3.png\" alt=\"Panda's histogram verwijdert het decimale percentage op de y-as\" width=\"527\" height=\"391\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Op de Y-as worden nu percentages weergegeven zonder cijfers achter de komma.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Aanvullende bronnen<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">In de volgende tutorials wordt uitgelegd hoe u andere veelvoorkomende taken in panda&#8217;s kunt uitvoeren:<\/span><\/p>\n<p> <a href=\"https:\/\/statorials.org\/nl\/pandas-histogrambakken\/\" target=\"_blank\" rel=\"noopener\">Hoe u het aantal gebruikte bakken in het Panda-histogram kunt wijzigen<\/a><br \/> <a href=\"https:\/\/statorials.org\/nl\/pandas-histogram-x-asbereik\/\" target=\"_blank\" rel=\"noopener\">Hoe het bereik van de X-as in Panda&#8217;s histogram te veranderen<\/a><br \/> <a href=\"https:\/\/statorials.org\/nl\/panda-histogram-per-groep\/\" target=\"_blank\" rel=\"noopener\">Hoe histogrammen per groep in Panda&#8217;s te plotten<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>U kunt de volgende basissyntaxis gebruiken om percentages op de y-as van een panda-histogram weer te geven: import pandas as pd import numpy as np import matplotlib. pyplot as plt from matplotlib. ticker import PercentFormatter #create histogram, using percentages instead of counts plt. hist (df[&#8218; my_column &#8218;], weights= np.ones ( len (df)) \/ len (df)) [&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":[],"class_list":["post-4155","post","type-post","status-publish","format-standard","hentry","category-gids"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hoe u het percentage op de Y-as van een panda-histogram kunt weergeven - Statorials<\/title>\n<meta name=\"description\" content=\"In deze tutorial wordt aan de hand van een voorbeeld uitgelegd hoe u percentages op de y-as van een panda-histogram kunt weergeven.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/statorials.org\/nl\/pandas-histogrampercentage\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hoe u het percentage op de Y-as van een panda-histogram kunt weergeven - Statorials\" \/>\n<meta property=\"og:description\" content=\"In deze tutorial wordt aan de hand van een voorbeeld uitgelegd hoe u percentages op de y-as van een panda-histogram kunt weergeven.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/nl\/pandas-histogrampercentage\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-13T05:53:17+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/pourcentage1.png\" \/>\n<meta name=\"author\" content=\"Dr.benjamin anderson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Verfasst von\" \/>\n\t<meta name=\"twitter:data1\" content=\"Dr.benjamin anderson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"2\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/nl\/pandas-histogrampercentage\/\",\"url\":\"https:\/\/statorials.org\/nl\/pandas-histogrampercentage\/\",\"name\":\"Hoe u het percentage op de Y-as van een panda-histogram kunt weergeven - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/nl\/#website\"},\"datePublished\":\"2023-07-13T05:53:17+00:00\",\"dateModified\":\"2023-07-13T05:53:17+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/nl\/#\/schema\/person\/d4b8842173cca1bb62cdec41860e4219\"},\"description\":\"In deze tutorial wordt aan de hand van een voorbeeld uitgelegd hoe u percentages op de y-as van een panda-histogram kunt weergeven.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/nl\/pandas-histogrampercentage\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/nl\/pandas-histogrampercentage\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/nl\/pandas-histogrampercentage\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Thuis\",\"item\":\"https:\/\/statorials.org\/nl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Hoe het percentage op de y-as van het panda-histogram wordt weergegeven\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/statorials.org\/nl\/#website\",\"url\":\"https:\/\/statorials.org\/nl\/\",\"name\":\"Statorials\",\"description\":\"Uw gids voor statistische competentie\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/statorials.org\/nl\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"de\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/statorials.org\/nl\/#\/schema\/person\/d4b8842173cca1bb62cdec41860e4219\",\"name\":\"Dr.benjamin anderson\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\/\/statorials.org\/nl\/#\/schema\/person\/image\/\",\"url\":\"http:\/\/statorials.org\/nl\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"contentUrl\":\"http:\/\/statorials.org\/nl\/wp-content\/uploads\/2023\/10\/Dr.-Benjamin-Anderson-96x96.jpg\",\"caption\":\"Dr.benjamin anderson\"},\"description\":\"Ik ben Benjamin, een gepensioneerde hoogleraar statistiek die nu een toegewijde Statorials-lesgever is. 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