[gmx-users] gmx gangle selections help

[Eric Smoll]

Hello gromacs users,

I want to map the angle between a specific bond vector (defined by the
atoms A and B) and the z axis using gmx gangle. I am only interested in
bond vectors that have a center-of-mass z-coordinate greater than C. Is
there a way to make this selection using the 'gmx select'-type statements?
I suspect that the selection below will not produce an appropriately paired
set of bond atoms. Am I correct?

-g1 vector
-g2  z
-group1 ''resname LIG and name A B and part_res_com z > C"

Best,
Eric