dval.m

快速高斯变换的程序

function v = dval(u, x, y, h)

N = length(u);
[D, M] = size(y);
v = zeros(M, 1);
for i = 1:M,
    for j = 1:N,
        dxy = (x(:,j) - y(:,i))/h;
        v(i) = v(i) + u(j)*exp(-dxy'*dxy);
    end
end

return;