[lammps-users] A different query

Dear lammps users,

I am going to post a little different query from lammps. Does anybody calculate
collective dynamic structure factor(S(k,w)) for a fluid? Please note that this is not the self part. I want the collective part. Could anybody send me the prescription for calculating the same? I will be really very much gratefull to you. Thank you in advance.

kind regards
bhaskar