近邻法的基本思想是在测试样本x的k个近邻中，按出现的样本类别来作为x的类别，即先对x的k个近邻一找出它们的类别，然后对x类别进行判别，即在N个训练样本中，找出x的k个近邻。-The basic idea is that neighbors in a test sample x, k-nearest neighbor in categories according to the sample appears as a type of x, ie the first k nearest neighbors of x, find them a category and then determine categories of x, ie In the N training samples, find x, k-nearest neighbor.