MATLAB: Could anyone help me how to change the values in array

Question

I ma having two array

   A=[1     2
      3     4
      5     6];
  B=[1 2];

I want to change the values present in rows of A which are not equal to B in the following manner

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

Could anyone please help me on it.

Answer 1

A=[1     2
   3     4
   5     6];
  B=[1 2];
  
 A = repmat(B,size(A,1),1)

or

A =  B .* ones(size(A))