练习二

helloLi_world

于 2018-03-17 15:12:10 发布

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本文链接：https://blog.youkuaiyun.com/helloLi_world/article/details/79592277

>> A=rand(3)

A =

    0.9649    0.9572    0.1419
    0.1576    0.4854    0.4218
    0.9706    0.8003    0.9157

>> A(4,5)=0

A =

    0.9649    0.9572    0.1419         0         0
    0.1576    0.4854    0.4218         0         0
    0.9706    0.8003    0.9157         0         0
         0         0         0         0         0

>> a=logspace(0,4,5)

a =

           1          10         100        1000       10000

>> b=diag(a)

b =

           1           0           0           0           0
           0          10           0           0           0
           0           0         100           0           0
           0           0           0        1000           0
           0           0           0           0       10000

>> save('data','b')

>> load('data.mat','b')
>> z=b

z =

           1           0           0           0           0
           0          10           0           0           0
           0           0         100           0           0
           0           0           0        1000           0
           0           0           0           0       10000

>> diag(z)

ans =

           1
          10
         100
        1000
       10000