The modeling of delta function in the numerical calculations

Hi everybody, i have a problem on modeling of the delta function in the numerical calculations. i am working on an topic related to the random process, and there is the delta function in this process. i must model the delta function and there are several articles containing the equations for modeling of the delta function. you can see the equations below picture.

Where Fi(t) and Fj(t') are random variables, Dij is the real number, and Xz is normally distributed random numbers. i don't modeling this delta function. thanks in advance.

[darova]

I think it's too complicated for this forum. Here are only students

[Paul]

"Here are only students." I assure you that's not the case.

Answer 1

[Paul]

Would it just be:

deltafunc = @(t,tprime,deltat)((abs(t-tprime)<deltat/2)./deltat); % assumes deltat > 0

Not sure how that Xz got into the mix.