{"id":3121,"date":"2015-07-13T08:20:43","date_gmt":"2015-07-13T07:20:43","guid":{"rendered":"https:\/\/abcdr.guyader.pro\/?p=3121"},"modified":"2018-04-08T00:01:58","modified_gmt":"2018-04-07T23:01:58","slug":"comment-appliquer-une-fonction-a-des-vecteurs-outer","status":"publish","type":"post","link":"https:\/\/thinkr.fr\/abcdr\/comment-appliquer-une-fonction-a-des-vecteurs-outer\/","title":{"rendered":"Comment appliquer une fonction sur chaque combinaison de deux vecteurs ? : outer"},"content":{"rendered":"<p>La fonction <b>outer() <\/b>permet d\u2019appliquer une fonction \u00e0 chaque couple de deux vecteurs. La fonction <strong>outer()<\/strong> retourne une matrice de la forme M(i, j) = f (xi , yj) o\u00f9 x et y sont des vecteurs et f une fonction de deux variables \u2192 f (x, y)<\/p>\n<pre><code>\n\n#On cr\u00e9e deux vecteurs :\n\nA &lt;- sample(5)\n\nA\n\nB &lt;- c(2,6)\n\nouter(A,B, FUN=\"+\") #On ajoute chaque \u00e9l\u00e9ment de A et de B 2 \u00e0 2 \n\n<\/code><\/pre>\n<p>\u00a0<br \/>\u00a0<\/p>\n<p>On obtient :<\/p>\n<pre><code>\n\nouter(A,B,FUN=\"+\")\n\n\u00a0\u00a0\u00a0\u00a0 [,1] [,2]\n\n[1,]\u00a0\u00a0\u00a0 5\u00a0\u00a0\u00a0 9\n\n[2,]\u00a0\u00a0\u00a0 7\u00a0\u00a0 11\n\n[3,]\u00a0\u00a0\u00a0 6\u00a0\u00a0 10\n\n[4,]\u00a0\u00a0\u00a0 3\u00a0\u00a0\u00a0 7\n\n[5,]\u00a0\u00a0\u00a0 4\u00a0\u00a0\u00a0 8\n\n<\/code><\/pre>\n<p>\u00a0 <br \/>\u00a0<\/p>\n<pre><code><br \/>Mois &lt;-c(\"Janv\",\"Fev\",\"Mars\")\n\nAnn\u00e9e &lt;- 2008:2010\n\nouter(Mois,Ann\u00e9e,FUN=\"paste\", sep=\"-\")\n\n<\/code><\/pre>\n<p>\u00a0<\/p>\n<p>On obtient :<\/p>\n<pre><code><br \/>outer(Mois,Ann\u00e9e,FUN=\"paste\", sep=\"-\")\n\n\u00a0\u00a0\u00a0\u00a0 [,1]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 [,2]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 [,3]\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\n\n[1,] \"Janv-2008\" \"Janv-2009\" \"Janv-2010\"\n\n[2,] \"Fev-2008\"\u00a0 \"Fev-2009\"\u00a0 \"Fev-2010\"\n\n[3,] \"Mars-2008\" \"Mars-2009\" \"Mars-2010\"\n\n<\/code><\/pre>\n<p>\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"<p>La fonction outer() permet d\u2019appliquer une fonction \u00e0 chaque couple de deux vecteurs. La fonction outer() retourne une matrice de la forme M(i, j) = f (xi , yj) o\u00f9 x et y sont des vecteurs et f une fonction de deux variables \u2192 f (x, y) #On cr\u00e9e deux vecteurs : A &lt;- sample(5) A B &lt;- c(2,6) outer(A,B, FUN=\u00a0\u00bb+\u00a0\u00bb) #On ajoute chaque \u00e9l\u00e9ment de A et de B 2 \u00e0 2 \u00a0\u00a0 On obtient : outer(A,B,FUN=\u00a0\u00bb+\u00a0\u00bb) \u00a0\u00a0\u00a0\u00a0 [,1] [,2] [1,]\u00a0\u00a0\u00a0 5\u00a0\u00a0\u00a0 9 [2,]\u00a0\u00a0\u00a0 7\u00a0\u00a0 11 [3,]\u00a0\u00a0\u00a0 6\u00a0\u00a0 10 [4,]\u00a0\u00a0\u00a0 3\u00a0\u00a0\u00a0 7 [5,]\u00a0\u00a0\u00a0 4\u00a0\u00a0\u00a0 8 \u00a0 \u00a0 Mois &lt;-c(\u00ab\u00a0Janv\u00a0\u00bb,\u00a0\u00bbFev\u00a0\u00bb,\u00a0\u00bbMars\u00a0\u00bb) Ann\u00e9e &lt;- 2008:2010 outer(Mois,Ann\u00e9e,FUN=\u00a0\u00bbpaste\u00a0\u00bb, sep=\u00a0\u00bb-\u00ab\u00a0)<a class=\"more-link\" href=\"https:\/\/thinkr.fr\/abcdr\/comment-appliquer-une-fonction-a-des-vecteurs-outer\/\">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":[8,12],"tags":[],"class_list":{"0":"entry","1":"post","2":"publish","3":"author-helene","4":"post-3121","6":"format-standard","7":"category-fonctions-utiles","8":"category-manipulation-de-donnees"},"acf":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p9O7Sx-Ol","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/3121","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=3121"}],"version-history":[{"count":2,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/3121\/revisions"}],"predecessor-version":[{"id":4273,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/3121\/revisions\/4273"}],"wp:attachment":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/media?parent=3121"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/categories?post=3121"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/tags?post=3121"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}