{"id":284,"date":"2014-09-28T14:43:55","date_gmt":"2014-09-28T12:43:55","guid":{"rendered":"http:\/\/wordpress.callac.online\/index.php\/debuter-avec-rstudio\/"},"modified":"2023-10-14T20:14:16","modified_gmt":"2023-10-14T18:14:16","slug":"debuter-avec-rstudio","status":"publish","type":"page","link":"https:\/\/wordpress.callac.online\/index.php\/logiciels-mathematiques\/le-logiciel-r\/generalites-sur-r\/debuter-avec-rstudio\/","title":{"rendered":"D\u00e9buter avec RStudio"},"content":{"rendered":"<h2>Pourquoi RStudio ?<\/h2>\n<p>Le logiciel de statistiques <a href=\"http:\/\/www.r-project.org\/\">R<\/a> fonctionne en console. Ceci rend son approche d\u00e9licate.<\/p>\n<p>l&rsquo;interface graphique <a href=\"http:\/\/www.rstudio.com\/\">RStudio<\/a>, disponible sur tous les syst\u00e8mes, permet d&rsquo;utiliser plus ais\u00e9ment les possibilit\u00e9s de R.<\/p>\n<h2>Une interface en quatre zones<\/h2>\n<p>&#8211; <strong>La console<\/strong> : c&rsquo;est l\u00e0 que seront affich\u00e9es les commandes ex\u00e9cut\u00e9es ainsi que les r\u00e9sultats non graphiques.<br \/>\n&#8211; <strong>Un \u00e9diteur<\/strong> : on pourra visualiser les fichiers de donn\u00e9es, mais aussi \u00e9diter des scripts.<br \/>\n&#8211; <strong>Un afficheur de variables et d&rsquo;historique<\/strong> : on y retrouvera la listes des variables et des fonctions globales utilis\u00e9es, ainsi que l&rsquo;historique de toutes les commandes.<br \/>\n&#8211; <strong> Un navigateur : pour acc\u00e9der facilement <\/strong><\/p>\n<ul>\n<li>aux fichiers<\/li>\n<li>aux graphiques<\/li>\n<li>aux paquets<\/li>\n<li>\u00e0 l&rsquo;aide<\/li>\n<\/ul>\n<h2>Choisir son r\u00e9pertoire de travail<\/h2>\n<p>Il est important de d\u00e9finir le r\u00e9pertoire de travail pour acc\u00e9der aux fichiers, mais aussi pour les sauvegardes.<\/p>\n<p>On peut le faire par le navigateur de fichiers. Il suffit de se placer dans le dossier voulu et d&rsquo;utiliser le menu \u00abMore-&gt;Set as Working Directory\u00bb.<\/p>\n<p>On voit alors dans la console la commande \u00e9quivalente :<\/p>\n<p><code class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">setwd(\"~\/monchemin\")<\/code><\/p>\n<h2>Charger un fichier de donn\u00e9es<\/h2>\n<p>On utilise le plus souvent un fichier csv, lui-m\u00eame issu d&rsquo;un tableur.<\/p>\n<p>Pour importer les donn\u00e9es, on peut utiliser l&rsquo;afficheur de variables et choisir \u00abImport data set -&gt; From Text File\u00bb.<\/p>\n<p>On peut alors choisir le nom de la variable, mais aussi le s\u00e9parateur utilis\u00e9. On voit alors un aper\u00e7u des donn\u00e9es.<\/p>\n<p>Dans la console appara\u00eet la commande correspondante :<\/p>\n<p><code class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\">donnees &lt;- read.csv(\"~\/fichier.csv\", sep=\";\")<\/code><\/p>\n<h2>Les scripts<\/h2>\n<p>Dans l&rsquo;\u00e9diteur, on peut cr\u00e9er un fichier de type script (d&rsquo;extension .r).<\/p>\n<p>On y placera les commandes \u00e0 ex\u00e9cuter et des lignes de commentaires commen\u00e7ant par un di\u00e8se.<\/p>\n<p>On peut ex\u00e9cuter une ligne du fichier en pla\u00e7ant le curseur sur cette ligne et en cliquant sur le bouton \u00abRun\u00bb.<\/p>\n<p>On peut aussi ex\u00e9cuter toutes les commandes en cliquant sur le bouton \u00abSource\u00bb.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Pourquoi RStudio ? Le logiciel de statistiques R fonctionne en console. Ceci rend son approche d\u00e9licate. l&rsquo;interface graphique RStudio, disponible sur tous les syst\u00e8mes, permet d&rsquo;utiliser plus ais\u00e9ment les possibilit\u00e9s&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2074,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-284","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>D\u00e9buter avec RStudio - Maths &amp; Num\u00e9rique<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/wordpress.callac.online\/index.php\/logiciels-mathematiques\/le-logiciel-r\/generalites-sur-r\/debuter-avec-rstudio\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"D\u00e9buter avec RStudio - Maths &amp; Num\u00e9rique\" \/>\n<meta property=\"og:description\" content=\"Pourquoi RStudio ? 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