From: Axel Kohlmeyer (akohlmey_at_gmail.com)
Date: Sat May 08 2010 - 19:34:30 CDT

On Sat, May 8, 2010 at 7:28 PM, Fatemesadat Emami <fe2_at_zips.uakron.edu> wrote:
>
> Dear vmd users,
> Is is possible to add two atomselections, say we have sel1 and sel2 and make
> sel3 which includes sel1 and sel2?

yes. there are many ways, but this should be fairly safe to use.

set mol [$sel1 molid]
if {$mol == [$sel2 molid]} {
  set sel3 [atomselect $mol "index [$sel1 list] $[sel2 list]"]
} else {
  error "only selections from the same molecule can be merged"
}

axel.

> Thanks
> Fatima
> --
> Yours Sincerely,
> Fateme Sadat Emami
> Nano Scale Laboratory
> Polymer Engineering Department
> The University of Akron
>

-- 
Dr. Axel Kohlmeyer    akohlmey_at_gmail.com
http://sites.google.com/site/akohlmey/
Institute for Computational Molecular Science
Temple University, Philadelphia PA, USA.