Turn a two dimensional vector into an array

I have a subset Ω of . I have discretised this subset into points, , also consider an identical copy of , .

Now, I have a given function , and want to create a matrix where K is of the form :

How can I do this on matlab, I will allow the use of for loops but I dont want to loop over the entire that will take too long.

Answer 1

[Yongjian Feng]

Check this command?