{"id":2988,"date":"2014-09-13T21:28:18","date_gmt":"2014-09-13T20:28:18","guid":{"rendered":"https:\/\/abcdr.guyader.pro\/?p=2988"},"modified":"2018-04-08T00:01:18","modified_gmt":"2018-04-07T23:01:18","slug":"calculer-simplement-la-sem-erreur-standard","status":"publish","type":"post","link":"https:\/\/thinkr.fr\/abcdr\/calculer-simplement-la-sem-erreur-standard\/","title":{"rendered":"Coment alculer simplement la SEM dans R ? (Erreur Standard)"},"content":{"rendered":"<p>Une petite fonction sans pr\u00e9tention qui vous permettra de calculer simplement la SEM de tout jeu de donn\u00e9e.<\/p>\n<pre><code><p>sem&lt;-function(x,digits= 3,na.rm=FALSE)<br \/>{<br \/>if(na.rm==TRUE) {x&lt;-x[!is.na(x)]}<br \/>return(round(sd(x)\/sqrt(length(x)),digits))<br \/>}<\/p><\/code><\/pre>\n<p>Exemple : <\/p>\n<pre><code>data&lt;-c(4,6,7,8,34,67,77,4,4) #soit un jeu de donn\u00e9e\u00a0<br \/>sem(data)<br \/>[1] 9.736<br \/><br \/>sem(data, digits = 4) #nous pouvons tout \u00e0 fait sp\u00e9cifier le nombre de chiffre apr\u00e8s la virgule \u00e0 consid\u00e9rer<br \/> [1] 9.7355 <\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Une petite fonction sans pr\u00e9tention qui vous permettra de calculer simplement la SEM de tout jeu de donn\u00e9e. sem&lt;-function(x,digits= 3,na.rm=FALSE){if(na.rm==TRUE) {x&lt;-x[!is.na(x)]}return(round(sd(x)\/sqrt(length(x)),digits))} Exemple : data&lt;-c(4,6,7,8,34,67,77,4,4) #soit un jeu de donn\u00e9e\u00a0sem(data)[1] 9.736sem(data, digits = 4) #nous pouvons tout \u00e0 fait sp\u00e9cifier le nombre de chiffre apr\u00e8s la virgule \u00e0 consid\u00e9rer [1] 9.7355<a class=\"more-link\" href=\"https:\/\/thinkr.fr\/abcdr\/calculer-simplement-la-sem-erreur-standard\/\">Read More &rarr;<\/a><\/p>\n","protected":false},"author":2,"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":[8,12],"tags":[],"class_list":{"0":"entry","1":"post","2":"publish","3":"author-vincent","4":"post-2988","6":"format-standard","7":"category-fonctions-utiles","8":"category-manipulation-de-donnees"},"acf":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p9O7Sx-Mc","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/2988","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/comments?post=2988"}],"version-history":[{"count":2,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/2988\/revisions"}],"predecessor-version":[{"id":4247,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/2988\/revisions\/4247"}],"wp:attachment":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/media?parent=2988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/categories?post=2988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/tags?post=2988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}