{"id":623,"date":"2011-11-09T15:55:56","date_gmt":"2011-11-09T14:55:56","guid":{"rendered":"https:\/\/abcdr.guyader.pro\/?p=623"},"modified":"2018-04-07T23:59:18","modified_gmt":"2018-04-07T22:59:18","slug":"quelles-sont-les-operations-numeriques-de-base-dans-r","status":"publish","type":"post","link":"https:\/\/thinkr.fr\/abcdr\/quelles-sont-les-operations-numeriques-de-base-dans-r\/","title":{"rendered":"Quelles sont les op\u00e9rations num\u00e9riques de base dans R ?"},"content":{"rendered":"<p>R poss\u00e8de de nombreuses fonctions de base souvent bien utiles, en voici quelques unes.<\/p>\n<p>On cr\u00e9e deux vecteurs : <\/p>\n<pre><code><br \/><br \/>a&lt;-c(1,2,3,4,5,6,7,8,9,10)<br \/>b&lt;-c(11,12,13,14,15,16,17,18,19,20)<br \/><br \/><\/code><\/pre>\n<p>Longueur des vecteurs : <\/p>\n<pre><code><br \/> <br \/>length(a)<br \/>length(b)<br \/> <br \/> <\/code><\/pre>\n<p>Minimum et maximum : <\/p>\n<pre><code><br \/> <br \/>min(a)<br \/>min(b)<br \/>max(a)<br \/>max(b)<br \/> <br \/> <\/code><\/pre>\n<p>Etendue : <\/p>\n<pre><code><br \/> <br \/>range(a)<br \/>range(b)<br \/> <br \/> <\/code><\/pre>\n<p>Moyenne et m\u00e9diane : <\/p>\n<pre><code><br \/> <br \/>mean(a)<br \/>mean(b)<br \/>median(a)<br \/>median(b)<br \/> <br \/> <\/code><\/pre>\n<p>Quantile et \u00e9cart inter-quantile : <\/p>\n<pre><code><br \/> <br \/>quantile(a)<br \/>quantile(b)<br \/>IQR(a)<br \/>IQR(b)<br \/> <br \/> <\/code><\/pre>\n<p>Variance et \u00e9cart-type : <\/p>\n<pre><code><br \/> <br \/>var(a)<br \/>var(b)<br \/>sd(a)<br \/>sd(b)<br \/> <br \/> <\/code><\/pre>\n<p>Concat\u00e9nation de a et b : <\/p>\n<pre><code><br \/> <br \/>c&lt;-c(a,b)<br \/>c<br \/><br \/>d&lt;-c(b,a)<br \/>d<br \/> <br \/> <\/code><\/pre>\n<p>Somme des \u00e9l\u00e9ments du vecteur, produit, diff\u00e9rence des \u00e9l\u00e9ments cons\u00e9cutifs du vecteur, somme cummul\u00e9e : <\/p>\n<pre><code><br \/> <br \/>v&lt;-c(1,2,3,4)<br \/><br \/>sum(v) #1+2+3+4<br \/><br \/>prod(v) #1*2*3*4<br \/><br \/>diff(v) #2-1,3-2,4-3<br \/><br \/>cumsum(v) #1, 1+2, 1+2+3, 1+2+3+4<br \/><br \/> <br \/> <\/code><\/pre>\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>R poss\u00e8de de nombreuses fonctions de base souvent bien utiles, en voici quelques unes. On cr\u00e9e deux vecteurs : a&lt;-c(1,2,3,4,5,6,7,8,9,10)b&lt;-c(11,12,13,14,15,16,17,18,19,20) Longueur des vecteurs : length(a)length(b) Minimum et maximum : min(a)min(b)max(a)max(b) Etendue : range(a)range(b) Moyenne et m\u00e9diane : mean(a)mean(b)median(a)median(b) Quantile et \u00e9cart inter-quantile : quantile(a)quantile(b)IQR(a)IQR(b) Variance et \u00e9cart-type : var(a)var(b)sd(a)sd(b) Concat\u00e9nation de a et b : c&lt;-c(a,b)cd&lt;-c(b,a)d Somme des \u00e9l\u00e9ments du vecteur, produit, diff\u00e9rence des \u00e9l\u00e9ments cons\u00e9cutifs du vecteur, somme cummul\u00e9e : v&lt;-c(1,2,3,4)sum(v) #1+2+3+4prod(v) #1*2*3*4diff(v) #2-1,3-2,4-3cumsum(v) #1, 1+2, 1+2+3, 1+2+3+4<a class=\"more-link\" href=\"https:\/\/thinkr.fr\/abcdr\/quelles-sont-les-operations-numeriques-de-base-dans-r\/\">Read More &rarr;<\/a><\/p>\n","protected":false},"author":6,"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":[4],"tags":[],"class_list":{"0":"entry","1":"post","2":"publish","3":"author-melen","4":"post-623","6":"format-standard","7":"category-base-indispensable"},"acf":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p9O7Sx-a3","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/623","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\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/comments?post=623"}],"version-history":[{"count":2,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/623\/revisions"}],"predecessor-version":[{"id":4105,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/623\/revisions\/4105"}],"wp:attachment":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/media?parent=623"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/categories?post=623"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/tags?post=623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}