[gmx-users] Remove COM of group only in x & y direction

[Mirijanian, Dina Tigranui]

Hello,

I need to be able to remove the COM motion of a defined group only in
x-direction and y-direction but not the z-direction.  Is there a way to do
this in GROMACS?  The comm_mode options removes ALL components of the COM
motion of the defined group.

Thank you.