[gmx-users] a query....

[Xavier Periole]

> This is what I got after typing "1 & 2"
>
> Copied index group 1 'group1'
> Copied index group 2 'group2'
> Merged two groups with AND: 635 637 -> 0
> Group is empty
>
here says the group is empty !!! Which is why there is zero !!!
the two groups have just no atoms in common !!! If you want to merge
you got to use pipe "|"

I don't beleive that this is not explain in where !!

> I noticed that line 3 has "-> 0" where "0" could be the default (or 
> "temp") group no. So I followed with "0" in the next command. It 
> creates a new group based on the result.

the default is to get the next free number for the index group !!

-- 
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 Xavier Periole - Ph.D.

 Dept. of Biophysical Chemistry / MD Group   
 Univ. of Groningen
 Nijenborgh 4
 9747 AG Groningen
 The Netherlands
 
 Tel: +31-503634329
 Fax: +31-503634398
 email: x.periole at rug.nl
 web-page: http://md.chem.rug.nl/~periole
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