the values of coordinates in matlab

if i have the matrix s= [

         0    0.4000    0.5000    0.6000    0.9000
    0.4000         0    0.3000    0.4000    0.5000
    0.5000    0.3000         0    0.5000    0.8000
    0.6000    0.4000    0.5000         0    0.6000
    0.9000    0.5000    0.8000    0.6000         0

and coordinates=[1 2; 1 3; 2 4] then i want that the values of previous coordinates equal zero. i.e s(1,2),s(2,1),s(1,3)s(3,1),s(2,4),s(4,2) equal 0 i.e i want this result

    0         0         0         0.6000    0.9000
    0         0         0.3000    0         0.5000
    0         0.3000         0    0.5000    0.8000
    0.6000    0         0.5000         0    0.6000
    0.9000    0.5000    0.8000    0.6000         0

Answer 1

[Azzi Abdelmalek]

idx=[1 2; 1 3; 2 4]
ii1=idx(:,1)
ii2=idx(:,2)
jdx=sub2ind(size(s),[ii1(:);ii2(:)],[ii2(:);ii1(:)])
s(jdx)=0

[muhammad ismat]

Thank you very much.