MATLAB: Replace elements between two matrices

Question

I have two matrices A and B:

A= [8 1;
   16 2];
B= [8 10;
   16  5]

I want to replace any element in B that exist in the 1st column of A, by its corresponding value in the second column of A. The result should be:

C=[1 10; 
   2  5];

Thanks for help

Answer 1

Try this:

A= [8 1;
   16 2]
B= [8 10;
   16  5]
% If A & B are integers
rowsToReplace = A(:, 1) == B(:, 1)
C = B; % Initialize C to B.
% Now, replace the rows that need replacing:
C(rowsToReplace, 1) = A(rowsToReplace, 2)