该楼层疑似违规已被系统折叠 隐藏此楼查看此楼
x=rand(5)
x =
0.5470 0.1835 0.9294 0.3063 0.6443
0.2963 0.3685 0.7757 0.5085 0.3786
0.7447 0.6256 0.4868 0.5108 0.8116
0.1890 0.7802 0.4359 0.8176 0.5328
0.6868 0.0811 0.4468 0.7948 0.3507
>> a=rand(5)
a =
0.9390 0.2077 0.1948 0.3111 0.9797
0.8759 0.3012 0.2259 0.9234 0.4389
0.5502 0.4709 0.1707 0.4302 0.1111
0.6225 0.2305 0.2277 0.1848 0.2581
0.5870 0.8443 0.4357 0.9049 0.4087
>> y=x*a
y =
1.7546 1.2212 0.6571 1.3791 1.0621
1.5666 0.9747 0.5541 1.2027 0.8242
2.3095 1.3754 0.8394 1.8476 1.5218
1.9224 1.1179 0.7058 1.6000 1.0048
1.6624 0.8568 0.5621 0.9450 1.1066
>> x1=y*inv(a)
x1 =
0.5470 0.1835 0.9294 0.3063 0.6443
0.2963 0.3685 0.7757 0.5085 0.3786
0.7447 0.6256 0.4868 0.5108 0.8116
0.1890 0.7802 0.4359 0.8176 0.5328
0.6868 0.0811 0.4468 0.7948 0.3507
>> norm(x1-x)
ans =
3.1081e-015误差很小了
x2=y/a (与x2=y*inv(a)等价)
x2 =
0.5470 0.1835 0.9294 0.3063 0.6443
0.2963 0.3685 0.7757 0.5085 0.3786
0.7447 0.6256 0.4868 0.5108 0.8116
0.1890 0.7802 0.4359 0.8176 0.5328
0.6868 0.0811 0.4468 0.7948 0.3507
>> norm(x2-x)
ans =
1.7692e-015误差很小了