{"id":3027,"date":"2015-07-06T07:34:11","date_gmt":"2015-07-06T06:34:11","guid":{"rendered":"https:\/\/abcdr.guyader.pro\/?p=3027"},"modified":"2018-04-08T00:01:26","modified_gmt":"2018-04-07T23:01:26","slug":"comment-obtenir-la-classe-des-colonnes-dun-data-frame-sapply","status":"publish","type":"post","link":"https:\/\/thinkr.fr\/abcdr\/comment-obtenir-la-classe-des-colonnes-dun-data-frame-sapply\/","title":{"rendered":"Comment obtenir la classe des colonnes d\u2019un data.Frame? : sapply"},"content":{"rendered":"<p>La fonction <strong>class()<\/strong> permet d\u2019obtenir la classe d\u2019un objet et la fonction <strong>sapply()<\/strong> permet d\u2019appliquer la fonction class() \u00e0 toutes les colonnes d&rsquo;un data.frame.<\/p>\n<pre><code>iris #On visualise les donn\u00e9es\n\nsapply(iris,class)<\/p><\/code><\/pre>\n<p>\u00a0<\/p>\n<p>On obtient\u00a0:<\/p>\n<pre><code> sapply(iris,class)\nSepal.Length\u00a0 Sepal.Width \u00a0Petal.Length \u00a0\u00a0Petal.Width\u00a0\u00a0\u00a0\u00a0\u00a0 Species\n\n<p>\u00a0\"numeric\"\u00a0 \u00a0\u00a0\u00a0\"numeric\"\u00a0\u00a0\u00a0 \"numeric\"\u00a0\u00a0 \u00a0\u00a0\"numeric\"\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\"factor\"<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>La fonction class() permet d\u2019obtenir la classe d\u2019un objet et la fonction sapply() permet d\u2019appliquer la fonction class() \u00e0 toutes les colonnes d&rsquo;un data.frame. iris #On visualise les donn\u00e9es sapply(iris,class) \u00a0 On obtient\u00a0: sapply(iris,class) Sepal.Length\u00a0 Sepal.Width \u00a0Petal.Length \u00a0\u00a0Petal.Width\u00a0\u00a0\u00a0\u00a0\u00a0 Species \u00a0\u00ab\u00a0numeric\u00a0\u00bb\u00a0 \u00a0\u00a0\u00a0\u00ab\u00a0numeric\u00a0\u00bb\u00a0\u00a0\u00a0 \u00ab\u00a0numeric\u00a0\u00bb\u00a0\u00a0 \u00a0\u00a0\u00ab\u00a0numeric\u00a0\u00bb\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00ab\u00a0factor\u00a0\u00bb<a class=\"more-link\" href=\"https:\/\/thinkr.fr\/abcdr\/comment-obtenir-la-classe-des-colonnes-dun-data-frame-sapply\/\">Read More &rarr;<\/a><\/p>\n","protected":false},"author":13,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","rop_custom_images_group":[],"rop_custom_messages_group":[],"rop_publish_now":"initial","rop_publish_now_accounts":{"twitter_399453572_399453572":""},"rop_publish_now_history":[],"rop_publish_now_status":"pending","jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[8],"tags":[],"class_list":{"0":"entry","1":"post","2":"publish","3":"author-helene","4":"post-3027","6":"format-standard","7":"category-fonctions-utiles"},"acf":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p9O7Sx-MP","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/3027","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/users\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/comments?post=3027"}],"version-history":[{"count":2,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/3027\/revisions"}],"predecessor-version":[{"id":4253,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/3027\/revisions\/4253"}],"wp:attachment":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/media?parent=3027"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/categories?post=3027"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/tags?post=3027"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}