How do I create such matrix ? (please look at the thread for further details)

Hi,

Let say I have 2 matrix A and B.

A=[1 2 3; 
   4 5 6]
B=[7 8 9; 
   10 11 12]

How do I create a matrix that becomes

C=[1-0 2-7 3-8;
   4-0 5-10 6-11]

And what will happen if I have n rows and m columns for both A and B?

Answer 1

[the cyclist]

B2 = [zeros(size(B,1),1) B(:,1:(end-1))];
C = A - B2;

Answer 2

[Amit]

How about

C = A;
C(:,2:end) = A(:,2:end)-B(:,1:end-1);

This solution is for generalized (n*m) system.

[Derick Wong]

Hi, may I know what if I have n rows and m columns for both A and B?

[Amit]

The solution written here will work for n rows and m columns system as well.