How to construct matrix for values have index?

I'm trying to construct a matrix H as the following pic. How can we write alpha _(-k,k) to get for example alpha _(0,0) or alpha _(-1,3) in Matlab?

Answer 1

[Sulaymon Eshkabilov]

Hi,

In this case, one of the possible easy solutions is to introduce new index series for alpha w.r.t its given values. As you know the index values can't be 0 or negative. Then insert them into H, e.g. H(1,1) = alpha(1);...

[Omar B.]

I think there's a way to do it just like the author did in the pic.