K-means算法是硬聚类算法，是典型的基于原型的目标函数聚类方法的代表，它是数据点到原型的某种距离作为优化的目标函数，利用函数求极值的方法得到迭代运算的调整规则。-K-means clustering algorithm is hard, is a typical prototype-based clustering methods on behalf of the objective function, it is a method of data points to a certain distance　the prototype as the optimization objective function obtained by the function extremum iteration the adjustment rules.