[gmx-users] Fw: probability from COM of micelle

[mohammad agha]

Dear GROMACS Specialist,

I want to plot probability (nm^-1) distribution of micelle selected atoms with respect to COM of the micelle (nm).
with respect to this definition, "Probability was defined as the number of instances the selected atom was found within a spherical shell of width 0.02 nm at a distance r from the micelle COM divided by r", may I ask you to give me one formula to plot of this probability, Please?
for example, to plot of density(nm^-3) with respect to COM of micelle (nm), I do as following:
density = g(r) * (N/V)

Thank you very much in advance.
Best Regards
Sara