How to merge variables and keeping the highest value only?

Lets say I have

A = 1  3  6  8
    4  6  7  9
    5  8  8  12

B = 4  1  9  5
    5  2  2  4
    4  5  2  14

How do i merge them together, but only keeping the highest value. Meaning, it will generate a third variable and get this:

C = 4  3  9  8
    5  6  7  9
    5  8  8  14

Answer 1

[Azzi Abdelmalek]

c=max(A,B)