Generating arrays using bsxfun with anonymous function and for elementwise subtractions - MATLAB

Question

I have the following code:

n = 10000; 
s = 100;
Z = rand(n, 2);
x = rand(s, 1);
y = rand(s, 1);
fun = @(a) exp(a);

In principle, the anonym

Answer 1

Code

exp_Z_x = exp(bsxfun(@minus,Z(:,1),x.')); %//'
exp_Z_y = exp(bsxfun(@minus,Z(:,2),y.')); %//'
out1 = bsxfun(@times,exp_Z_x,permute(exp_Z_y,[1 3 2]));

Z1 = [ones(n,1) Z(:,1) Z(:,2)];
X1 = permute([ zeros(s,1) x zeros(s,1)],[3 2 1]);
Y1 = permute([ zeros(s,1) zeros(s,1) y],[4 2 3 1]);
out2 = bsxfun(@minus,bsxfun(@minus,Z1,X1),Y1);

out3 = zeros(n,n,s,s); %// out3(n,n,s,s) = 0; could be used for performance
out3(bsxfun(@plus,[1:n+1:n*n]',[0:s*s-1]*n*n)) = out1; %//'

%// out1, out2 and out3 are the desired outputs