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learn_KNN

K临近值算法,即:
对一个目标数据A进行分类,进行如下计算:

  1. 计算数据集中各个数据与A的distance
  2. 对distance进行排序
  3. 找出distance最小的K个数据
  4. 对这个K个数据所属类别进行统计
  5. 统计数最多的类别,即为A的所属类别

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