[gmx-users] gmx density scripting?

[Dayhoff, Guy]

Is there a simple way to script the gmx density tool as to 
circumvent the need to manually select the groups from
within the program? i.e. is there a way to specify the groups
during the command call such as:

gmx density -f traj.xtc -s input.tpr -ng 2 -grps 5,8

where -grps lets me tell it what groups to select for. Or would
I need to modify the code myself to achieve this?

My Best,
  Guy Dayhoff