[gmx-users] Gmx distance

[rose rahmani]

Hi,

I want to calculate distances between fixed tube in the middle of the box
and amino acids(all are same type)around it. But gmx distance gives me the
relative distance i mean AA can be front or back( can be 0.5 or -0.5 from
tube) of  tube but still |-0.5|=0.5 nm far from it. How can i have the
absolute value of distances?
Would you please help me?

Best
Rose