Create spatial weighting matrix by Stata

Question

I used -spmatrix create command to create weighting matrix but when I created idistance, no matter I change the vtruncate(1/180) or vtruncate(1/350) the output matrix result is the same. how to fix that?

Command I used:

spmatrix create idistance W180 if year==2021, vtruncate(1/180) norm(row)replace

spmatrix create idistance W350 if year==2021, vtruncate(1/350) norm(row)replace

Please help me to solve that problem