How to calculate this formula?

I have a vector of weight w(1,n) and a vector of correlation p(n,1). How can calculate this formula?

[fede]

Sorry, I have the matrix of correlation, and not a vector.

Answer 1

[Star Strider]

See if this works:

wij = triu(bsxfun(@times, w, w'));
num = wij*p;
den = sum(wij(:));
pr = sum(num(:))/den);