Re: [gmx-users] make index group

2009-07-01 Thread Mark Abraham

Bing Bing wrote:

Dear all,
I'm trying to perform order parameter analysis. I 've use :-
make_ndx_d -f xxx.tpr -o sn1.ndx

  15  a Cxx |...
 q

i've got this error :-
Group 15 not exist.


So use a group that does exist. If you're copying an index group 
creation recipe from some tutorial, go back to that and understand what 
this step is designed to achieve, and then adjust it to suit your new 
context.


Mark
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Re: [gmx-users] make index group

2009-07-01 Thread Justin A. Lemkul



Mark Abraham wrote:

Bing Bing wrote:

Dear all,
I'm trying to perform order parameter analysis. I 've use :-
make_ndx_d -f xxx.tpr -o sn1.ndx

  15  a Cxx |...
 q

i've got this error :-
Group 15 not exist.


So use a group that does exist. If you're copying an index group 
creation recipe from some tutorial, go back to that and understand what 
this step is designed to achieve, and then adjust it to suit your new 
context.




In addition to Mark's advice, please see the wiki page for g_order; it explains 
exactly how to create the necessary index groups.  If you're merging groups on 
into one, as it appears you are, you're doing it wrong.


http://oldwiki.gromacs.org/index.php/g_order

-Justin

--


Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin


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