﻿功能:对方阵进行LU2分解.

格式:
[L,U]=lu2(A)
A:一个n解方阵变量

说明:函数执行完毕返回矩阵A的LU分解,即L*U=A.其中L为下三角矩阵且对角线全为1,U为上三角矩阵

例子:

a =
 [ 9.52295674454558    2.62114554300026    4.02599394508917
   9.65538669827179    5.3693214502974     1.73833080648367
   4.36154077032653    9.50125717069081    6.00379359256653  ]

[l,u]=lu2(a)//回车得到如下结果
l =
[ 1.00000000000000    0.00000000000000    0.00000000000000
  1.01390639034479    1.00000000000000    0.00000000000000
  0.45800279128902    3.06106425933385    1.00000000000000 ]
u =
[ 9.52295674454558    2.62114554300026    4.02599394508917
  0.00000000000000    2.71172523422567   -2.34365018193167
  0.00000000000000    0.00000000000000    11.3339409362953 ]