get maximum value of four arrays

Hello

I am trying to compare the same elements of four arrays of the same size.For example,I have created arrays GM1,GM2,GM3,GM4 of size(x,y). And I want to create a final array with element (1,1) the maximum of GM1(1,1),GM2(1,1),GM3(1,1),GM4(1,1) and making the same for elements final(1,2) and the rest.I have created the following code but I cannot get any result.Could somebody help me with this?

Thanks in advance

===========code=============== for i=1:x for j=1:y

    m=GM1(i,j);
    if(GM2(i,j)>m) m=GM2(i,j);
    if(GM3(i,j)>m) m=GM3(i,j);
    if(GM4(i,j)>m) m=GM4(i,j);
final(i,j)=m;
end;
end;

Answer 1

[Sean de Wolski]

max(cat(3,GM1,GM2,GM3,GM4),[],3)

Answer 2

[Jan]

For large arrays this consumes less memory:

max(max(GM1, GM2), max(GM3, GM4))