How do I compare all elements of two arrays?

Question

I have two big arrays with about 1000 rows and 1000 columns. I need to compare each element of these arrays and store 1 in another array if the corresponding elements are eq

Answer 1

Just use the normal == operator:

>> [1 2; 3 4] == [1 5; 6 4]      

ans =

     1     0
     0     1