\u00a0lorsque l’on utilise une variable de type qualitative (ordonn\u00e9e ou non) R va classer les diff\u00e9rents niveaux par ordre alphab\u00e9tique,
ce qui n’st pas toujours l’idial. voici la proc\u00e9dure permettant de changer l’ordre des niveaux de facteur:<\/p>\n
vec<-as.factor(c(\"haut\",\"haut\",\"bas\",\"moyen\",\"moyen\"))
levels(vec) #l'ordre ne va pas
vec2<-factor(vec,c(\"bas\",\"moyen\",\"haut\"))
# si vous voulez simplement mettre un des niveau en premier pour l'utiliser en tant que r\u00e9f\u00e9rence en regression
vec3<-relevel(vec,ref=\"moyen\")
levels(vec)
levels(vec2)
levels(vec3)<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u00a0lorsque l’on utilise une variable de type qualitative (ordonn\u00e9e ou non) R va classer les diff\u00e9rents niveaux par ordre alphab\u00e9tique,ce qui n’st pas toujours l’idial. voici la proc\u00e9dure permettant de changer l’ordre des niveaux de facteur: vec<-as.factor(c(\u00ab\u00a0haut\u00a0\u00bb,\u00a0\u00bbhaut\u00a0\u00bb,\u00a0\u00bbbas\u00a0\u00bb,\u00a0\u00bbmoyen\u00a0\u00bb,\u00a0\u00bbmoyen\u00a0\u00bb))levels(vec) #l’ordre ne va pasvec2<-factor(vec,c(\u00ab\u00a0bas\u00a0\u00bb,\u00a0\u00bbmoyen\u00a0\u00bb,\u00a0\u00bbhaut\u00a0\u00bb))# si vous voulez simplement mettre un des niveau en premier pour l’utiliser en tant que r\u00e9f\u00e9rence en regressionvec3<-relevel(vec,ref=\u00a0\u00bbmoyen\u00a0\u00bb)levels(vec)levels(vec2)levels(vec3)Read More →<\/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":[12],"tags":[],"class_list":{"0":"entry","1":"post","2":"publish","3":"author-vincent","4":"post-2725","6":"format-standard","7":"category-manipulation-de-donnees"},"acf":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/p9O7Sx-HX","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/2725","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=2725"}],"version-history":[{"count":2,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/2725\/revisions"}],"predecessor-version":[{"id":4223,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/posts\/2725\/revisions\/4223"}],"wp:attachment":[{"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/media?parent=2725"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/categories?post=2725"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thinkr.fr\/abcdr\/wp-json\/wp\/v2\/tags?post=2725"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}