翻訳と辞書 Words near each other ・ Nearchus (disambiguation) ・ Nearchus of Elea ・ Nearchus of Orchomenus ・ Nearco ・ Nearctic (horse) ・ Nearctic ecozone ・ Nearctic Stakes ・ Neardonaea ・ Nearer My God to Thee (album) ・ Nearer My God to Thee (disambiguation) ・ Nearer My God to Thee (film) ・ Nearer the Moon ・ Nearer, My God, to Thee ・ Nearest and Dearest ・ Nearest and Dearest (film) ・ Nearest centroid classifier ・ Nearest integer function ・ Nearest neighbor ・ Nearest neighbor graph ・ Nearest neighbor search ・ Nearest neighbor value interpolation ・ Nearest neighbour algorithm ・ Nearest neighbour classifiers ・ Nearest neighbour distribution ・ Nearest referent ・ Nearest relative ・ Nearest-neighbor chain algorithm ・ Nearest-neighbor interpolation ・ NEARfest ・ NearGlobal Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Nearest centroid classifier ： ウィキペディア英語版 Nearest centroid classifier In machine learning, a nearest centroid classifier or nearest prototype classifier is a classification model that assigns to observations the label of the class of training samples whose mean (centroid) is closest to the observation. When applied to text classification using tf *idf vectors to represent documents, the nearest centroid classifier is known as the Rocchio classifier because of its similarity to the Rocchio algorithm for relevance feedback. An extended version of the nearest centroid classifier has found applications in the medical domain, specifically classification of tumors. == Algorithm == * Training procedure: given labeled training samples $\backslash textstyle\backslash \_n,\; y\_n)\backslash \}$ with class labels $y\_i\; \backslash in\; \backslash mathbf$, compute the per-class centroids $\backslash textstyle\backslash vec\; =\; \backslash frac\backslash underset\; \backslash vec\_i$ where $C\_l$ is the set of indices of samples belonging to class $l\; \backslash in\; \backslash mathbf$. * Prediction function: the class assigned to an observation $\backslash vec$ is $\backslash hat\; =\; \_\_l\; -\; \backslash vec\backslash |$. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Nearest centroid classifier」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.