{"id":10791,"date":"2019-11-23T11:11:44","date_gmt":"2019-11-23T09:11:44","guid":{"rendered":"https:\/\/www.datanovia.com\/en\/?p=10791"},"modified":"2019-12-25T10:56:33","modified_gmt":"2019-12-25T08:56:33","slug":"ggplot-aes-comment-assigner-les-esthetiques-dans-ggplot2","status":"publish","type":"post","link":"https:\/\/www.datanovia.com\/en\/fr\/blog\/ggplot-aes-comment-assigner-les-esthetiques-dans-ggplot2\/","title":{"rendered":"GGPlot AES : Comment Assigner les Esth\u00e9tiques dans GGPlot2"},"content":{"rendered":"<div id=\"rdoc\">\n<p>Dans cet article, vous apprendrez \u00e0 mapper les variables des donn\u00e9es en fonction des propri\u00e9t\u00e9s visuelles des graphiques ggplot (points, barres, box plots, etc.).<\/p>\n<p>Ces caract\u00e9ristiques visuelles sont appel\u00e9es <strong>esth\u00e9tiques<\/strong> (ou <strong>aes<\/strong>) et comprennent:<\/p>\n<ul>\n<li>couleur et remplissage<\/li>\n<li>forme des points<\/li>\n<li>type de ligne<\/li>\n<li>size<\/li>\n<li>group<\/li>\n<li>etc<\/li>\n<\/ul>\n<p>Les mappages d\u2019esth\u00e9tiques peuvent \u00eatre d\u00e9finis dans <code>ggplot()' et dans des fonctions individuelles (telles que<\/code>geom_point()<code>,<\/code>geom_line()`, etc).<\/p>\n<p>Sommaire:<\/p>\n<div id=\"TOC\">\n<ul>\n<li><a href=\"#prerequis\">Pr\u00e9requis<\/a><\/li>\n<li><a href=\"#notions-de-base\">Notions de base<\/a><\/li>\n<li><a href=\"#couleur-et-remplissage\">Couleur et remplissage<\/a><\/li>\n<li><a href=\"#forme\">Forme<\/a><\/li>\n<li><a href=\"#groupe-et-type-de-ligne\">Groupe et type de ligne<\/a><\/li>\n<li><a href=\"#etiquette\">\u00c9tiquette<\/a><\/li>\n<li><a href=\"#creer-des-wrappers-fonctions-enveloppantes-autour-des-fonctions-ggplot2\">Cr\u00e9er des wrappers (fonctions enveloppantes) autour des fonctions ggplot2<\/a><\/li>\n<\/ul>\n<\/div>\n<div class='dt-sc-hr-invisible-medium  '><\/div>\n<div class='dt-sc-ico-content type1'><div class='custom-icon' ><a href='https:\/\/www.datanovia.com\/en\/fr\/produit\/ggplot2-lessentiel-pour-une-visualisation-magnifique-des-donnees-dans-r\/' target='_blank'><span class='fa fa-book'><\/span><\/a><\/div><h4><a href='https:\/\/www.datanovia.com\/en\/fr\/produit\/ggplot2-lessentiel-pour-une-visualisation-magnifique-des-donnees-dans-r\/' target='_blank'> Livre Apparent\u00e9 <\/a><\/h4>GGPLOT2 - L\u2019Essentiel pour une Visualisation Magnifique des Donn\u00e9es dans R<\/div>\n<div class='dt-sc-hr-invisible-medium  '><\/div>\n<div id=\"prerequis\" class=\"section level2\">\n<h2>Pr\u00e9requis<\/h2>\n<p>Charger les packages requis et d\u00e9finir la fonction th\u00e8me <code>theme_bw()<\/code> comme th\u00e8me par d\u00e9faut:<\/p>\n<pre class=\"r\"><code>library(ggplot2) \r\ntheme_set(theme_bw())<\/code><\/pre>\n<\/div>\n<div id=\"notions-de-base\" class=\"section level2\">\n<h2>Notions de base<\/h2>\n<p>Mapper l\u2019esth\u00e9tique \u00e0 des variables et des fonctions des variables:<\/p>\n<pre class=\"r\"><code># Mapper les esth\u00e9tiques aux variables\r\nggplot(ToothGrowth, aes(x = supp, y = len)) +\r\n  geom_boxplot()\r\n\r\n# Mapper les esth\u00e9tiques aux fonctions des variables\r\nggplot(mtcars, aes(x = mpg ^ 2, y = wt \/ cyl)) +\r\n  geom_point()<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-basics-1.png\" width=\"288\" \/><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-basics-2.png\" width=\"288\" \/><\/p>\n<p>L\u2019esth\u00e9tique peut aussi \u00eatre mapp\u00e9e \u00e0 des constantes:<\/p>\n<pre class=\"r\"><code># mapper x \u00e0 une constante : 1\r\nggplot(ToothGrowth, aes(x = factor(1), y = len)) +\r\n  geom_boxplot(width = 0.5) +\r\n  geom_jitter(width = 0.1)<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-constant-1.png\" width=\"288\" \/><\/p>\n<div class=\"warning\">\n<p>Notez que, aes() est pass\u00e9 soit \u00e0 ggplot() soit \u00e0 une couche sp\u00e9cifique. L\u2019esth\u00e9tique sp\u00e9cifi\u00e9e dans ggplot() est utilis\u00e9e par d\u00e9faut pour chaque couche.<\/p>\n<\/div>\n<p>Par exemple:<\/p>\n<pre class=\"r\"><code># Utilisez ceci \r\nggplot(mpg, aes(displ, hwy)) + geom_point()\r\n\r\n# ou ceci\r\nggplot(mpg) + geom_point(aes(displ, hwy))<\/code><\/pre>\n<\/div>\n<div id=\"couleur-et-remplissage\" class=\"section level2\">\n<h2>Couleur et remplissage<\/h2>\n<pre class=\"r\"><code># Couleur\r\nggplot(ToothGrowth, aes(supp, len)) +\r\n  geom_boxplot(aes(color = supp))\r\n\r\n# Remplir\r\nggplot(ToothGrowth, aes(supp, len)) +\r\n  geom_boxplot(aes(fill = supp))<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-color-and-fill-1.png\" width=\"336\" \/><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-color-and-fill-2.png\" width=\"336\" \/><\/p>\n<\/div>\n<div id=\"forme\" class=\"section level2\">\n<h2>Forme<\/h2>\n<p>Modifier la forme des points par groupe:<\/p>\n<pre class=\"r\"><code>ggplot(iris, aes(Sepal.Length, Sepal.Width)) +\r\n  geom_point(aes(shape = Species))<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-shape-1.png\" width=\"336\" \/><\/p>\n<\/div>\n<div id=\"groupe-et-type-de-ligne\" class=\"section level2\">\n<h2>Groupe et type de ligne<\/h2>\n<p>Dans le line plot, par exemple, l\u2019esth\u00e9tique de groupe est utilis\u00e9e pour s\u2019assurer que les lignes sont trac\u00e9es s\u00e9par\u00e9ment pour chaque groupe<\/p>\n<pre class=\"r\"><code># Data\r\ndf2 &lt;- data.frame(supp=rep(c(\"VC\", \"OJ\"), each=3),\r\n                dose=rep(c(\"D0.5\", \"D1\", \"D2\"),2),\r\n                len=c(6.8, 15, 33, 4.2, 10, 29.5))\r\n\r\nhead(df2, 4)<\/code><\/pre>\n<pre><code>##   supp dose  len\r\n## 1   VC D0.5  6.8\r\n## 2   VC   D1 15.0\r\n## 3   VC   D2 33.0\r\n## 4   OJ D0.5  4.2<\/code><\/pre>\n<pre class=\"r\"><code># Cr\u00e9er un line plot group\u00e9\r\nggplot(df2, aes(dose, len, group = supp)) +\r\n  geom_line() +\r\n  geom_point()\r\n\r\n\r\n# Changer le type de ligne par groupe\r\nggplot(df2, aes(dose, len, group = supp)) +\r\n  geom_line(aes(linetype = supp)) +\r\n  geom_point()<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-group-and-line-type-1.png\" width=\"288\" \/><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-group-and-line-type-2.png\" width=\"288\" \/><\/p>\n<\/div>\n<div id=\"etiquette\" class=\"section level2\">\n<h2>\u00c9tiquette<\/h2>\n<pre class=\"r\"><code>ggplot(df2, aes(dose, len, group = supp)) +\r\n  geom_line() +\r\n  geom_point() +\r\n  geom_text(aes(label = len, vjust = -0.5))<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-label-1.png\" width=\"288\" \/><\/p>\n<\/div>\n<div id=\"creer-des-wrappers-fonctions-enveloppantes-autour-des-fonctions-ggplot2\" class=\"section level2\">\n<h2>Cr\u00e9er des wrappers (fonctions enveloppantes) autour des fonctions ggplot2<\/h2>\n<p><code>aes()<\/code> met des guillemets automatiquement autour de tous ses arguments, vous devez donc utiliser la \u201ctidy-evaluation\u201d pour cr\u00e9er des wrappers autour des fonctions ggplot2.<\/p>\n<ol style=\"list-style-type: decimal;\">\n<li>Cas le plus simple : votre wrappers prend des points<\/li>\n<\/ol>\n<pre class=\"r\"><code>scatter_plot &lt;- function(data, ...) {\r\n  ggplot(data) + geom_point(aes(...))\r\n}\r\nscatter_plot(mtcars, disp, drat)<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-wrapper-with-dots-1.png\" width=\"288\" \/><\/p>\n<ol style=\"list-style-type: decimal;\" start=\"2\">\n<li>Votre wrapper a des arguments nomm\u00e9s. Vous avez besoin de \u201cenquote et unquote\u201d<\/li>\n<\/ol>\n<pre class=\"r\"><code>scatter_plot &lt;- function(data, x, y) {\r\n  x &lt;- enquo(x)\r\n  y &lt;- enquo(y)\r\n\r\n  ggplot(data) + geom_point(aes(!!x, !!y))\r\n}\r\nscatter_plot(mtcars, disp, drat)<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-wrapper-with-named-argument-1.png\" width=\"288\" \/><\/p>\n<div class=\"warning\">\n<p>Notez que les utilisateurs de votre wrapper peuvent utiliser leurs propres fonctions dans les expressions avec \u201cquotes\u201d (guillemets).<\/p>\n<\/div>\n<pre class=\"r\"><code>cut3 &lt;- function(x) cut_number(x, 3)\r\nscatter_plot(mtcars, cut3(disp), drat)<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/127-ggplot-aes-using-functions-in-wrapper-1.png\" width=\"288\" \/><\/p>\n<\/div>\n<\/div>\n<p><!--end rdoc--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dans cet article, vous apprendrez \u00e0 mapper les variables des donn\u00e9es en fonction des propri\u00e9t\u00e9s visuelles des graphiques ggplot (points, barres, box plots, etc.). Ces caract\u00e9ristiques visuelles sont appel\u00e9es esth\u00e9tiques [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10744,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rating_form_position":"","rating_results_position":"","mr_structured_data_type":"","footnotes":""},"categories":[279],"tags":[286],"class_list":["post-10791","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ggplot2-fr","tag-faq-ggplot2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>GGPlot AES : Comment Assigner les Esth\u00e9tiques dans GGPlot2 - Datanovia<\/title>\n<meta name=\"description\" content=\"Dans cet article, vous apprendrez \u00e0 mapper les variables des donn\u00e9es en fonction des propri\u00e9t\u00e9s visuelles des graphiques ggplot (points, barres, box plot, etc.).\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.datanovia.com\/en\/fr\/blog\/ggplot-aes-comment-assigner-les-esthetiques-dans-ggplot2\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"GGPlot AES : Comment Assigner les Esth\u00e9tiques dans GGPlot2 - 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