[gmx-users] protein XYZ dimension function of time

[atanu das]

Hi All,
Is there a simple way to calculate a protein's X, Y, and Z dimensions from a trajectory as a function of time (not the box vector, the protein dimensions as in how the protein spreads itself in the 3 directions as the simulation progresses)? I see that GROMACS has an option to estimate protein volume as a function of time, but I need to know how the individual dimensions change as a function of time. 
ThanksAtanu