
>> A=[1 2 1 2; 3 4 3 4; 5 6 5 6; 7 8 7 8]
A =
     1     2     1     2
     3     4     3     4
     5     6     5     6
     7     8     7     8
>> B=[4 4 4 4; 2 2 2 2; 3 3 3 3; 1 1 1 1]
B =
     4     4     4     4
     2     2     2     2
     3     3     3     3
     1     1     1     1
>> C=A*B
C =
    13    13    13    13
    33    33    33    33
    53    53    53    53
    73    73    73    73
>> D=[1 2 3;4 5 6;7 8 9]
D =
     1     2     3
     4     5     6
     7     8     9
>> E=A*D
??? Error using ==> *
Inner matrix dimensions must agree.
>> 
