矩阵初等行变换、初等列变换

B1=A1*E1

>> A1=[1,2,3;4,5,6;7,8,9]

A1 =

     1     2     3
     4     5     6
     7     8     9

>> 
>> E1=[0,0,1;0,1,0;1,0,0]

E1 =

     0     0     1
     0     1     0
     1     0     0

>> 
>> 
>> B1=A1*E1

B1 =

     3     2     1
     6     5     4
     9     8     7

>> 
>>