compare and combine matrices

Hi

I have 2 matrices, let's say:

A=[1 2 3; 1 2 3; 1 2 3]

B=[1 2 3; 2 1 3; 3 2 1]

Now i want a matrix C that contains the value in A&B if A = B, and the subtract (A-B)*10 when A and B are different.

I created a matrix

D=A-B

And then I used a for loop with an if command

for t=1:length(A) for l=1:length(A) if D(l,t) == 0 C(l,t)=A(l,t) else C(l,t)=D(l,t)*10 end end end

This works but it takes very long as i have huge matrices; Is there a possibility to avoid the for loop?

Thank you very much in advance

Nina

Answer 1

[Andrei Bobrov]

C = A;
t = A~=B;
C(t) = 10*(A(t) - B(t));