K均值聚类算法

k均值算法是模式识别的聚分类问题，这是用C#实现其算法
以下是程序源代码：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
namespace KMean_win
{
     /// 
     /// Form1 的摘要说明。
     /// 
     public class Form1 : System.Windows.Forms.Form
     {
         /// 
         /// 必需的设计器变量。
         /// 
         private System.ComponentModel.Container components = null;
         private static int k = 2;                          //类数，此例题为2类
         private static int total = 20;                      //点个数
         private int test = 0;
         private PointF[] unknown = new PointF[total];  //点数组
         private int[] type = new int[total];           //每个点暂时的类
         public PointF[] z = new PointF[k];                 //保存新的聚类中心
         public PointF[] z0 = new PointF[k];                //保存上一次的聚类中心
         private PointF sum;
         private int temp = 0;
         private System.Windows.Forms.TextBox textBox1;
         private int l = 0;          //迭代次数

//构造函数，初始化
         public Form1()
         {
              unknown[0]=new Point(0,0);
              unknown[1]=new Point(1,0);
              unknown[2]=new Point(0,1);
              unknown[3]=new Point(1,1);
              unknown[4]=new Point(2,1);
              unknown[5]=new Point(1,2);
              unknown[6]=new Point(2,2);
              unknown[7]=new Point(3,2);
              unknown[8]=new Point(6,6);
              unknown[9]=new Point(7,6);
              unknown[10]=new Point(8,6);
              unknown[11]=new Point(6,7);
              unknown[12]=new Point(7,7);
              unknown[13]=new Point(8,7);
              unknown[14]=new Point(9,7);
              unknown[15]=new Point(7,8);
              unknown[16]=new Point(8,8);
              unknown[17]=new Point(9,8);
              unknown[18]=new Point(8,9);
              unknown[19]=new Point(9,9);
              
              InitializeComponent();
              
              test = 0;
              //选k个初始聚类中心    z[i]     
              for(int i=0;i                   z[i] = unknown[i];
              for(int i=0;i                   type[i] = 0;