{"id":4487,"date":"2026-07-29T17:02:49","date_gmt":"2026-07-29T15:02:49","guid":{"rendered":"https:\/\/ellistat.com\/?post_type=guide-dutilisateur&#038;p=4487"},"modified":"2026-07-29T17:03:01","modified_gmt":"2026-07-29T15:03:01","slug":"classification-non-supervisee","status":"publish","type":"guide-dutilisateur","link":"https:\/\/ellistat.com\/es\/guide-dutilisateur\/classification-non-supervisee\/","title":{"rendered":"Clasificaci\u00f3n no supervisada"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Cette analyse cherche \u00e0&nbsp;<strong>regrouper les individus en familles<\/strong>&nbsp;sans qu&rsquo;on ait d\u00e9fini les familles \u00e0 l&rsquo;avance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Zona 1<\/strong>&nbsp;: la m\u00e9thode et ses options.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u21d2&nbsp;<strong>K-means<\/strong>&nbsp;: familles de taille comparable, il faut donner leur nombre ;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u21d2&nbsp;<strong>Division binaire<\/strong>&nbsp;: d\u00e9coupe successivement le nuage en deux ;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u21d2&nbsp;<strong>M\u00e9langes gaussiens<\/strong>&nbsp;: accepte des familles de formes et de dispersions diff\u00e9rentes ;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u21d2&nbsp;<strong>DBSCAN<\/strong>&nbsp;: trouve le nombre de familles lui-m\u00eame et sait laisser des points de c\u00f4t\u00e9. R\u00e9gl\u00e9 par&nbsp;<strong>Epsilon<\/strong>&nbsp;(le rayon de voisinage) et&nbsp;<strong>Points minimum<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nombre de clusters (K)<\/strong>&nbsp;fixe le nombre de familles pour les trois premi\u00e8res m\u00e9thodes.&nbsp;<strong>Valeur initiale<\/strong>&nbsp;rend le r\u00e9sultat reproductible d&rsquo;un calcul \u00e0 l&rsquo;autre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Zona 2<\/strong>&nbsp;: le nuage dans l&rsquo;<strong>Espace des composantes principales (ACP)<\/strong>, en 2D ou 3D, une couleur par groupe.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Zona 3<\/strong>&nbsp;: pour chaque variable, un test qui r\u00e9pond \u00e0 cette variable distingue-t-elle r\u00e9ellement les groupes ? \u2014 un test de Fisher et un test de Kruskal-Wallis, avec leur conclusion color\u00e9e du tr\u00e8s significatif au non significatif.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"964\" height=\"610\" src=\"https:\/\/ellistat.com\/wp-content\/uploads\/image6-1.png\" alt=\"\" class=\"wp-image-4488\" srcset=\"https:\/\/ellistat.com\/wp-content\/uploads\/image6-1.png 964w, https:\/\/ellistat.com\/wp-content\/uploads\/image6-1-300x190.png 300w, https:\/\/ellistat.com\/wp-content\/uploads\/image6-1-768x486.png 768w, https:\/\/ellistat.com\/wp-content\/uploads\/image6-1-18x12.png 18w\" sizes=\"auto, (max-width: 964px) 100vw, 964px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udca1&nbsp;C&rsquo;est la Zone 3 qui valide la classification. Des groupes bien s\u00e9par\u00e9s \u00e0 l&rsquo;\u00e9cran mais dont aucune variable n&rsquo;est significative n&rsquo;ont pas de sens m\u00e9tier : la partition existe sur le graphique, pas dans les donn\u00e9es.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udca1&nbsp;La m\u00eame classification est disponible directement dans le plan de l&rsquo;ACP, par la case \u00ab Classification non supervis\u00e9e (KMeans) \u00bb. Le num\u00e9ro affich\u00e9 \u00e0 c\u00f4t\u00e9 de chaque point est celui de sa&nbsp;<strong>famille<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"menu-guide-dutilisateur":[40],"class_list":["post-4487","guide-dutilisateur","type-guide-dutilisateur","status-publish","hentry","menu-guide-dutilisateur-6-statistiques-multivariees"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Classification non supervis\u00e9e - Ellistat<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ellistat.com\/es\/guia-del-usuario\/classification-non-supervisee\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Classification non supervis\u00e9e - Ellistat\" \/>\n<meta property=\"og:description\" content=\"Cette analyse cherche \u00e0&nbsp;regrouper les individus en familles&nbsp;sans qu&rsquo;on ait d\u00e9fini les familles \u00e0 l&rsquo;avance. 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