{"id":1192,"date":"2023-07-27T08:27:48","date_gmt":"2023-07-27T08:27:48","guid":{"rendered":"https:\/\/statorials.org\/nl\/beeldverhouding-matplotlib\/"},"modified":"2023-07-27T08:27:48","modified_gmt":"2023-07-27T08:27:48","slug":"beeldverhouding-matplotlib","status":"publish","type":"post","link":"https:\/\/statorials.org\/nl\/beeldverhouding-matplotlib\/","title":{"rendered":"Hoe de beeldverhouding in matplotlib in te stellen"},"content":{"rendered":"<p><\/p>\n<hr>\n<p><span style=\"color: #000000;\">De <strong>beeldverhouding<\/strong> van een matplotlib-plot verwijst naar het aspect van asschaling, dat wil zeggen de verhouding van de y-eenheid tot de x-eenheid.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Deze verhouding kan worden gewijzigd met behulp van de functie <a href=\"https:\/\/matplotlib.org\/stable\/api\/_as_gen\/matplotlib.axes.Axes.set_aspect.html\" target=\"_blank\" rel=\"noopener noreferrer\">matplotlib.axes.Axes.set_aspect()<\/a> .<\/span><\/p>\n<p> <span style=\"color: #000000;\">Onder de motorkap verandert de functie <strong>set_aspect()<\/strong> feitelijk wat het <strong>dataco\u00f6rdinatensysteem<\/strong> wordt genoemd, maar in de praktijk willen we meestal het <strong>weergaveco\u00f6rdinatensysteem<\/strong> wijzigen.<\/span><\/p>\n<p> <span style=\"color: #000000;\">Om deze conversie te vergemakkelijken, kunnen we dit stukje code gebruiken:<\/span><\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008080;\">#define y-unit to x-unit ratio<\/span>\nratio = 1.0\n\n<span style=\"color: #008080;\">#get x and y limits\n<\/span>x_left, x_right = ax. <span style=\"color: #3366ff;\">get_xlim<\/span> ()\ny_low, y_high = ax. <span style=\"color: #3366ff;\">get_ylim<\/span> ()\n\n<span style=\"color: #008080;\">#set aspect ratio<\/span>\nax. <span style=\"color: #3366ff;\">set_aspect<\/span> ( <span style=\"color: #3366ff;\">abs<\/span> ((x_right-x_left)\/(y_low-y_high))*ratio)\n<\/strong><\/pre>\n<p> <span style=\"color: #000000;\">Laten we een voorbeeld bekijken van het gebruik van deze functie in de praktijk.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Stap 1: Maak een basis Matplotlib-plot<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Laten we eerst een eenvoudig lijndiagram maken met Matplotlib:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> matplotlib.pyplot <span style=\"color: #008000;\">as<\/span> plt\n\n<span style=\"color: #008080;\">#define matplotlib figure and axis\n<\/span>fig, ax = plt. <span style=\"color: #3366ff;\">subplots<\/span> ()\n\n<span style=\"color: #008080;\">#create simple line plot\n<\/span>ax. <span style=\"color: #3366ff;\">plot<\/span> ([0, 10],[0, 20])\n\n<span style=\"color: #008080;\">#displayplot\n<\/span>plt. <span style=\"color: #3366ff;\">show<\/span> ()\n<\/strong><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11841 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aspectratio1.png\" alt=\"\" width=\"387\" height=\"250\" srcset=\"\" sizes=\"auto, \"><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Stap 2: Stel de beeldverhouding in (verkeerde kant op)<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Merk op dat de x-as langer is dan de y-as. Laten we proberen de beeldverhouding in te stellen op 1, dat wil zeggen dat de x-as en de y-as gelijk moeten zijn:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> matplotlib.pyplot <span style=\"color: #008000;\">as<\/span> plt\n\n<span style=\"color: #008080;\">#define matplotlib figure and axis\n<\/span>fig, ax = plt. <span style=\"color: #3366ff;\">subplots<\/span> ()\n\n<span style=\"color: #008080;\">#create simple line plot\n<\/span>ax. <span style=\"color: #3366ff;\">plot<\/span> ([0, 10],[0, 20])\n\n<span style=\"color: #008080;\">#attempt to set aspect ratio to 1\n<\/span>ax. <span style=\"color: #3366ff;\">set_aspect<\/span> (1)\n\n<span style=\"color: #008080;\">#displayplot\n<\/span>plt. <span style=\"color: #3366ff;\">show<\/span> ()<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11842 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aspectratio2.png\" alt=\"\" width=\"174\" height=\"276\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Houd er rekening mee dat dit niet werkte zoals verwacht. De y-as is veel langer dan de x-as.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Stap 3: Stel de beeldverhouding in (op de juiste manier)<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">De volgende code laat zien hoe u een eenvoudige berekening kunt gebruiken om de juiste beeldverhouding in te stellen:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> matplotlib.pyplot <span style=\"color: #008000;\">as<\/span> plt\n\n<span style=\"color: #008080;\">#define matplotlib figure and axis\n<\/span>fig, ax = plt. <span style=\"color: #3366ff;\">subplots<\/span> ()\n\n<span style=\"color: #008080;\">#create simple line plot\n<\/span>ax. <span style=\"color: #3366ff;\">plot<\/span> ([0, 10],[0, 20])\n\n<span style=\"color: #008080;\">#set aspect ratio to 1\n<\/span>ratio = 1.0\nx_left, x_right = ax. <span style=\"color: #3366ff;\">get_xlim<\/span> ()\ny_low, y_high = ax. <span style=\"color: #3366ff;\">get_ylim<\/span> ()\nax. <span style=\"color: #3366ff;\">set_aspect<\/span> ( <span style=\"color: #3366ff;\">abs<\/span> ((x_right-x_left)\/(y_low-y_high))*ratio)\n\n<span style=\"color: #008080;\">#displayplot\n<\/span>plt. <span style=\"color: #3366ff;\">show<\/span> ()<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11843 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/rapport-daspect3.png\" alt=\"Stel plotverhoudingen matplotlib in\" width=\"295\" height=\"273\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">Merk op dat deze plot de beeldverhouding heeft die we verwachtten. De x-as en y-as zijn even lang.<\/span><\/p>\n<h2> <span style=\"color: #000000;\"><strong>Stap 4: Pas de beeldverhouding naar wens aan<\/strong><\/span><\/h2>\n<p> <span style=\"color: #000000;\">Als we willen dat de y-as langer is dan de x-as, kunnen we eenvoudigweg specificeren dat de beeldverhouding een getal groter dan 1 is:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> matplotlib.pyplot <span style=\"color: #008000;\">as<\/span> plt\n\n<span style=\"color: #008080;\">#define matplotlib figure and axis\n<\/span>fig, ax = plt. <span style=\"color: #3366ff;\">subplots<\/span> ()\n\n<span style=\"color: #008080;\">#create simple line plot\n<\/span>ax. <span style=\"color: #3366ff;\">plot<\/span> ([0, 10],[0, 20])\n\n<span style=\"color: #008080;\">#set aspect ratio to 3\n<\/span>ratio = 3\nx_left, x_right = ax. <span style=\"color: #3366ff;\">get_xlim<\/span> ()\ny_low, y_high = ax. <span style=\"color: #3366ff;\">get_ylim<\/span> ()\nax. <span style=\"color: #3366ff;\">set_aspect<\/span> ( <span style=\"color: #3366ff;\">abs<\/span> ((x_right-x_left)\/(y_low-y_high))*ratio)\n\n<span style=\"color: #008080;\">#displayplot\n<\/span>plt. <span style=\"color: #3366ff;\">show<\/span> ()<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11844 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aspectratio4.png\" alt=\"matplotlib-afbeeldingsformaat\" width=\"141\" height=\"277\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\">En als we willen dat de y-as korter is dan de x-as, kunnen we eenvoudigweg specificeren dat de beeldverhouding een getal kleiner dan 1 is:<\/span> <\/p>\n<pre style=\"background-color: #ececec; font-size: 15px;\"> <strong><span style=\"color: #008000;\">import<\/span> matplotlib.pyplot <span style=\"color: #008000;\">as<\/span> plt\n\n<span style=\"color: #008080;\">#define matplotlib figure and axis\n<\/span>fig, ax = plt. <span style=\"color: #3366ff;\">subplots<\/span> ()\n\n<span style=\"color: #008080;\">#create simple line plot\n<\/span>ax. <span style=\"color: #3366ff;\">plot<\/span> ([0, 10],[0, 20])\n\n<span style=\"color: #008080;\">#set aspect ratio to .3\n<\/span>ratio = .3\nx_left, x_right = ax. <span style=\"color: #3366ff;\">get_xlim<\/span> ()\ny_low, y_high = ax. <span style=\"color: #3366ff;\">get_ylim<\/span> ()\nax. <span style=\"color: #3366ff;\">set_aspect<\/span> ( <span style=\"color: #3366ff;\">abs<\/span> ((x_right-x_left)\/(y_low-y_high))*ratio)\n\n<span style=\"color: #008080;\">#displayplot\n<\/span>plt. <span style=\"color: #3366ff;\">show<\/span> ()<\/strong> <\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"aligncenter wp-image-11845 \" src=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/rapport-daspect5.png\" alt=\"Matplotlib x-as aspectverhouding langer dan y-as\" width=\"402\" height=\"142\" srcset=\"\" sizes=\"auto, \"><\/p>\n<p> <span style=\"color: #000000;\"><em>Je kunt hier meer Matplotlib-tutorials vinden.<\/em><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>De beeldverhouding van een matplotlib-plot verwijst naar het aspect van asschaling, dat wil zeggen de verhouding van de y-eenheid tot de x-eenheid. Deze verhouding kan worden gewijzigd met behulp van de functie matplotlib.axes.Axes.set_aspect() . Onder de motorkap verandert de functie set_aspect() feitelijk wat het dataco\u00f6rdinatensysteem wordt genoemd, maar in de praktijk willen we meestal het [&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-1192","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 de beeldverhouding in te stellen in Matplotlib - Statorials<\/title>\n<meta name=\"description\" content=\"In deze tutorial wordt uitgelegd hoe je verhoudingen in Matplotlib instelt, met verschillende voorbeelden.\" \/>\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\/beeldverhouding-matplotlib\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hoe de beeldverhouding in te stellen in Matplotlib - Statorials\" \/>\n<meta property=\"og:description\" content=\"In deze tutorial wordt uitgelegd hoe je verhoudingen in Matplotlib instelt, met verschillende voorbeelden.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/statorials.org\/nl\/beeldverhouding-matplotlib\/\" \/>\n<meta property=\"og:site_name\" content=\"Statorials\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-27T08:27:48+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/statorials.org\/wp-content\/uploads\/2023\/08\/aspectratio1.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=\"3\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/statorials.org\/nl\/beeldverhouding-matplotlib\/\",\"url\":\"https:\/\/statorials.org\/nl\/beeldverhouding-matplotlib\/\",\"name\":\"Hoe de beeldverhouding in te stellen in Matplotlib - Statorials\",\"isPartOf\":{\"@id\":\"https:\/\/statorials.org\/nl\/#website\"},\"datePublished\":\"2023-07-27T08:27:48+00:00\",\"dateModified\":\"2023-07-27T08:27:48+00:00\",\"author\":{\"@id\":\"https:\/\/statorials.org\/nl\/#\/schema\/person\/d4b8842173cca1bb62cdec41860e4219\"},\"description\":\"In deze tutorial wordt uitgelegd hoe je verhoudingen in Matplotlib instelt, met verschillende voorbeelden.\",\"breadcrumb\":{\"@id\":\"https:\/\/statorials.org\/nl\/beeldverhouding-matplotlib\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/statorials.org\/nl\/beeldverhouding-matplotlib\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/statorials.org\/nl\/beeldverhouding-matplotlib\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Thuis\",\"item\":\"https:\/\/statorials.org\/nl\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Hoe de beeldverhouding in matplotlib in te stellen\"}]},{\"@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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