1.计算两类样本的隶属度；2.使用quadprog函数求解svm的拉格朗日乘子；3.主成份分析-1.caculate the membership of 2 samples；2.use quadprog function to get the lagrangian multiplier；3.principle component analasys

dbscan的matlab实现，dbscan密度聚类算法的快速实现聚类，计算速度有所加快，能快速聚类。-dbscan matlab realize, quickly realize clustering dbscan density clustering algorithm to calculate the rate has accelerated, rapid clustering.

用matlab 实现了kmeans算法还附有评价指标计算(Matlab to achieve kmeans algorithm also attached to the evaluation index calculation)