MSD unit (nm/S2/N)

[Narges]

GROMACS version:22.3
GROMACS modification: No

Hi all,
It is known that MSD (mean square displacement) unit is nm^2 while in gmx msd it is nm/S2/N. Are they the same?

[jalemkul]

nm\S2\N is XmGrace syntax for nm².