{"id":10627,"date":"2019-11-20T00:21:12","date_gmt":"2019-11-19T22:21:12","guid":{"rendered":"https:\/\/www.datanovia.com\/en\/?p=10627"},"modified":"2019-11-20T00:21:12","modified_gmt":"2019-11-19T22:21:12","slug":"ggplot-personnalisation-des-dates-sur-les-axes","status":"publish","type":"post","link":"https:\/\/www.datanovia.com\/en\/fr\/blog\/ggplot-personnalisation-des-dates-sur-les-axes\/","title":{"rendered":"GGPLOT Personnalisation des Dates sur les Axes"},"content":{"rendered":"<div id=\"rdoc\">\n<p>Cet article d\u00e9crit comment formater une <strong>date sur un axe ggplot<\/strong> en utilisant les fonctions R <em>scale_x_date<\/em>() et <em>scale_y_date<\/em>().<\/p>\n<p>Dans ce tutoriel graphique R, vous apprendrez \u00e0:<\/p>\n<ul>\n<li><strong>Modifier les dates sur les axes<\/strong> en utilisant diff\u00e9rentes combinaisons de jours, de semaines, de mois, d\u2019ann\u00e9es<\/li>\n<li><strong>Modifier les limites de l\u2019axe des dates<\/strong>.<\/li>\n<\/ul>\n<p>Sommaire:<\/p>\n<div id=\"TOC\">\n<ul>\n<li><a href=\"#fonctions-cles-de-ggplot2\">Fonctions cl\u00e9s de ggplot2<\/a><\/li>\n<li><a href=\"#donnees-des-series-chronologiques\">Donn\u00e9es des s\u00e9ries chronologiques<\/a><\/li>\n<li><a href=\"#creer-un-ggplot-simple-avec-des-dates-sur-laxe\">Cr\u00e9er un ggplot simple avec des dates sur l\u2019axe<\/a><\/li>\n<li><a href=\"#format-des-dates-sur-laxe-scale_x_date\">Format des dates sur l\u2019axe : scale_x_date<\/a><\/li>\n<li><a href=\"#definir-les-limites-des-axes\">D\u00e9finir les limites des axes<\/a><\/li>\n<li><a href=\"#conclusion\">Conclusion<\/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=\"fonctions-cles-de-ggplot2\" class=\"section level2\">\n<h2>Fonctions cl\u00e9s de ggplot2<\/h2>\n<ul>\n<li><code>scale_x_date(date_labels, limits)<\/code> et <code>scale_y_date(date_labels, limits)<\/code> : Format des axes de date<\/li>\n<li><code>scale_x_datetime(date-labels, limits)<\/code> et <code>scale_y_datetime(date_labels, limites)<\/code> : Formater la date et l\u2019heure sur l\u2019axe<\/li>\n<\/ul>\n<\/div>\n<div id=\"donnees-des-series-chronologiques\" class=\"section level2\">\n<h2>Donn\u00e9es des s\u00e9ries chronologiques<\/h2>\n<p>Cr\u00e9er des jeux de donn\u00e9es de s\u00e9ries chronologiques:<\/p>\n<pre class=\"r\"><code>set.seed(1234)\r\nlast_month &lt;- Sys.Date() - 0:29\r\ndf &lt;- data.frame(\r\n  date = last_month,\r\n  price = runif(30)\r\n)\r\nhead(df)<\/code><\/pre>\n<pre><code>##         date price\r\n## 1 2019-11-19 0.114\r\n## 2 2019-11-18 0.622\r\n## 3 2019-11-17 0.609\r\n## 4 2019-11-16 0.623\r\n## 5 2019-11-15 0.861\r\n## 6 2019-11-14 0.640<\/code><\/pre>\n<\/div>\n<div id=\"creer-un-ggplot-simple-avec-des-dates-sur-laxe\" class=\"section level2\">\n<h2>Cr\u00e9er un ggplot simple avec des dates sur l\u2019axe<\/h2>\n<pre class=\"r\"><code>library(ggplot2)\r\np &lt;- ggplot(data=df, aes(x = date, y = price)) +\r\n  geom_line()\r\np<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/025-ggplot-date-axis-simple-plot-1.png\" width=\"384\" \/><\/p>\n<\/div>\n<div id=\"format-des-dates-sur-laxe-scale_x_date\" class=\"section level2\">\n<h2>Format des dates sur l\u2019axe : scale_x_date<\/h2>\n<p>Pour formater la date sur les axes, vous pouvez utiliser diff\u00e9rentes combinaisons de jours, semaines, mois et ann\u00e9es:<\/p>\n<ul>\n<li>Nom du jour de la semaine : utilisez <code>%a<\/code> et <code>%A<\/code> pour le nom abr\u00e9g\u00e9 et le nom complet du jour de la semaine, respectivement<\/li>\n<li>Nom du mois : utilisez <code>%b<\/code> et <code>%B<\/code> pour le nom abr\u00e9g\u00e9 et le nom complet du mois, respectivement<\/li>\n<li><code>%d<\/code>: jour du mois comme nombre d\u00e9cimal<\/li>\n<li><code>%U<\/code>: semaine de l\u2019ann\u00e9e comme nombre d\u00e9cimal (00-53)<\/li>\n<li><code>%Y<\/code>: Ann\u00e9e avec si\u00e8cle.<\/li>\n<li>Voir plus d\u2019options dans la documentation de la fonction <code>?strptime<\/code><\/li>\n<\/ul>\n<pre class=\"r\"><code># Format : mois\/jour\r\np + scale_x_date(date_labels = \"%b\/%d\")\r\n\r\n# Format : Semaine\r\np + scale_x_date(date_labels = \"%U\")\r\n\r\n# Mois seulement\r\np + scale_x_date(date_labels = \"%B\")+\r\n  theme(axis.text.x = element_text(angle=45, hjust = 1))<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/025-ggplot-date-axis-format-date-axis-scale_x_date-1.png\" width=\"240\" \/><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/025-ggplot-date-axis-format-date-axis-scale_x_date-2.png\" width=\"240\" \/><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/025-ggplot-date-axis-format-date-axis-scale_x_date-3.png\" width=\"240\" \/><\/p>\n<\/div>\n<div id=\"definir-les-limites-des-axes\" class=\"section level2\">\n<h2>D\u00e9finir les limites des axes<\/h2>\n<p>Utiliser le jeu de donn\u00e9es des s\u00e9ries chronologiques <code>economics<\/code>[en ggplot2]:<\/p>\n<pre class=\"r\"><code>data(\"economics\")\r\n# Graphe basique avec des dates sur les axes\r\np &lt;- ggplot(data = economics, aes(x = date, y = psavert)) + \r\n     geom_line(color = \"steelblue\")\r\np\r\n\r\n# D\u00e9finir les limites de l'axe c(min, max)\r\nmin &lt;- as.Date(\"2002-1-1\")\r\nmax &lt;- NA\r\np + scale_x_date(limits = c(min, max))<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/025-ggplot-date-axis-scale_x_date-limits-1.png\" width=\"288\" \/><img decoding=\"async\" src=\"https:\/\/www.datanovia.com\/en\/wp-content\/uploads\/dn-tutorials\/ggplot2\/figures\/025-ggplot-date-axis-scale_x_date-limits-2.png\" width=\"288\" \/><\/p>\n<\/div>\n<div id=\"conclusion\" class=\"section level2\">\n<h2>Conclusion<\/h2>\n<p>Pour changer le format des \u00e9tiquettes des axes, lisez d\u2019abord la page d\u2019aide de la fonction R <code>strptime()<\/code> pour voir les formats de date disponible.<\/p>\n<p>Ensuite, utilisez l\u2019exemple suivant de code R:<\/p>\n<pre class=\"r\"><code>p + scale_x_date(date_labels = \"%b\/%d\")<\/code><\/pre>\n<\/div>\n<\/div>\n<p><!--end rdoc--><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Cet article d\u00e9crit comment formater une date sur un axe ggplot en utilisant les fonctions R scale_x_date() et scale_y_date(). Dans ce tutoriel graphique R, vous apprendrez \u00e0: Modifier les dates [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":10628,"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":[316],"class_list":["post-10627","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ggplot2-fr","tag-parametres-graphiques-ggplot2"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>GGPLOT Personnalisation des Dates sur les Axes: Guide Facile - Datanovia<\/title>\n<meta name=\"description\" content=\"Vous apprendrez comment : Modifier les \u00e9tiquettes des axes de date en utilisant diff\u00e9rentes combinaisons de jours, semaines, mois, ann\u00e9e ; et modifiez les limites des axes de date.\" \/>\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-personnalisation-des-dates-sur-les-axes\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"GGPLOT Personnalisation des Dates sur les Axes: Guide Facile - Datanovia\" \/>\n<meta property=\"og:description\" content=\"Vous apprendrez comment : Modifier les \u00e9tiquettes des axes de date en utilisant diff\u00e9rentes combinaisons de jours, semaines, mois, ann\u00e9e ; 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