[gmx-users] How to choose z component of two groups

Мижээ Батсайхан b.mijiddorj at gmail.com
Tue Feb 7 05:17:58 CET 2017

Dear Justin,

Thank you very much for your reply.

I inspected the thickness.xvg. There are number of columns in this file, I
could not realize that which one is Z component of thickness.
I also got averaged values using -oav option. How can I get the averaged
values of Z component?

Best regards,


Dear gmx users,

I am performing analysis of membrane system. I would like to estimate
membrane thickness.

I toke following command:

gmx distance 0s topol.tpr -f traj.xtc -n selected_P.ndx -oav ave.xvg -oxyz

I do not know how to select z component of the two groups.

Is there any advice, please?

Have you inspected the contents of thickness.xvg? I suspect you'll find
exactlywhat you're looking for.



Justin A. Lemkul, Ph.D.
Ruth L. Kirschstein NRSA Postdoctoral Fellow

Department of Pharmaceutical Sciences
School of Pharmacy
Health Sciences Facility II, Room 629
University of Maryland, Baltimore
20 Penn St.
Baltimore, MD 21201
jalem... at outerbanks.umaryland.edu | (410)


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