Help comparing two matrices

so I need to compare two matrices but I need to set the values the final compared matrice will have... so for example if one value is higher than the other it should display 1; if it is lower -1 and finally if it is equal 0. I have been messing with this but cant figure it out I think I need a way to go over the two matrices comparing the two elements and but then how do I set those elements back into a matrice....? why is it so complicated!!!

well i need a function... sorry and thanks for the quick responses

Answer 1

[Azzi Abdelmalek]

idxp=A>B
idxn=A<B
C=zeros(size(A))
C(idxp)=1;
C(idxn)=-1

Answer 2

[Roger Stafford]

   C = sign(A-B);