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K 近邻算法 - 菜鸟教程 K 近邻算法(K-Nearest Neighbors,简称 KNN)是一种简单且常用的分类和回归算法。 K 近邻算法属于监督学习的一种,核心思想是通过计算待分类样本与训练集中各个样本的距离,找到距离最近的 K 个样本,然后根据这 K 个样本的类别或值来预测待分类样本的类别或值。
k-nearest neighbors algorithm - Wikipedia ^ a b Mirkes, Evgeny M ; KNN and Potential Energy: applet Archived 2012-01-19 at the Wayback Machine, University of Leicester, 2011 ^ Ramaswamy, Sridhar; Rastogi, Rajeev; Shim, Kyuseok (2000) "Efficient algorithms for mining outliers from large data sets" Proceedings of the 2000 ACM SIGMOD international conference on Management of data