{"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":"2026-07-30T10:33:06","modified_gmt":"2026-07-30T08:33:06","slug":"classificazione-non-supervisionata","status":"publish","type":"guide-dutilisateur","link":"https:\/\/ellistat.com\/it\/guide-dutilisateur\/classification-non-supervisee\/","title":{"rendered":"Classificazione non supervisionata"},"content":{"rendered":"<p class=\"wp-block-paragraph\">La presente analisi mira a&nbsp;<strong>raggruppare le persone in famiglie<\/strong>&nbsp;senza che le famiglie fossero state definite in anticipo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Zona 1<\/strong>&nbsp;: il metodo e le sue opzioni.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u21d2&nbsp;<strong>K-means<\/strong>&nbsp;: per le famiglie di dimensioni simili, occorre indicarne il numero; ;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u21d2&nbsp;<strong>Divisione binaria<\/strong>&nbsp;: divide la nuvola in due parti, una dopo l'altra; ;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u21d2&nbsp;<strong>Miscele gaussiane<\/strong>&nbsp;: accetta famiglie di forme e dispersioni diverse; ;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u21d2&nbsp;<strong>DBSCAN<\/strong>&nbsp;: calcola autonomamente il numero di famiglie e sa tralasciare alcuni elementi. Regolato da&nbsp;<strong>Epsilon<\/strong>&nbsp;(il raggio di vicinato) e&nbsp;<strong>Punteggio minimo<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Numero di cluster (K)<\/strong>&nbsp;stabilisce il numero di famiglie per i primi tre metodi.&nbsp;<strong>Valore iniziale<\/strong>&nbsp;garantisce la riproducibilit\u00e0 del risultato da un calcolo all\u2019altro.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Zona 2<\/strong>&nbsp;: la nuvola nel\u2019<strong>Spazio delle componenti principali (ACP)<\/strong>, in 2D o 3D, un colore per gruppo.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Zona 3<\/strong>&nbsp;: per ogni variabile, un test che risponda alla domanda \u00abquesta variabile distingue effettivamente i gruppi?\u00bb \u2014 un test di Fisher e un test di Kruskal-Wallis, con le relative conclusioni contrassegnate a colori da \u201cmolto significativo\u201d a \u201cnon significativo\u201d.<\/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 \u00c8 la Zona 3 a confermare la classificazione. Gruppi ben distinti sullo schermo, ma per i quali nessuna variabile \u00e8 significativa, non hanno alcun senso dal punto di vista operativo: la suddivisione esiste sul grafico, non nei dati.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\ud83d\udca1 La stessa classificazione \u00e8 disponibile direttamente nella mappa dell'ACP, nella casella \u00abClassificazione non supervisionata (K-Means)\u00bb. Il numero visualizzato accanto a ciascun punto \u00e8 quello della sua&nbsp;<strong>famiglia<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"featured_media":0,"menu_order":80,"template":"","meta":{"_acf_changed":true},"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 v28.3 - 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\/it\/guida-per-lutente\/classificazione-non-supervisionata\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\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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