[gmx-users] a query....

[X.Periole]

On Sun, 29 Jan 2006 10:44:05 -0800 (PST)
  <leafyoung81-group at yahoo.com> wrote:
> Thanks for the reply. 
> 
> I tried but found not straitforward in manipulating on 
>the group level with make_ndx. It does a good job on 
>spliting bigger group into smaller ones and select atoms 
>(but what to do with selected atoms?). It is not clear in 
>the online help. Or is it designed in such way?
> 

I have used it at many occasions and always could do
everything I wanted.
two exemples:
1 & 2 : would select the atoms crossing the two groups 1 
and 2.
1 | 2: would select atoms from two groups 1 and 2.

and so on. But you can also write a script to generate
your own group and insert it in the index.

XAvier