﻿功能:获取离散(Scatter)点矩阵

格式:Scatter(a)

说明:a为矩阵变量,返回的矩阵=A*C*A'//A'是矩阵A的转置.其中C是centering matrix

例子:

x =
 [ 99.7857897541419  9.51486570272356  63.1951831109799
   25.9399024424795  42.4458858289038  36.6808995309663
   93.1339228959446  50.7395400901975  47.2185231965121
   31.3650836848491  87.4213179514843  85.4504978216488 ]

s=Scatter(x)//回车后得到如下结果
s =
 [ 4123.09623355424  -730.832088805865   1772.68104509233  -2381.68681000941
  -730.832088805865   140.350524341069  -390.879846203595   505.852099442587
   1772.68104509233  -390.879846203595   1305.96839433483  -1617.6278570591
  -2381.68681000941   505.852099442587  -1617.6278570591    2023.80585149639  ]