Re: [gmx-users] user defined potential function for 1-4 interaction

2009-10-30 Thread M Hafizur Rahman
Hi Berk:

Thanks for your eply. I guess I would supply two column in the table for the 
bond type 9 [r(nm) and W(kJ/mol) ]. In that case (according to the user manual) 
what is the significance of k? how  k will come into the calculation? If I 
select constraints = all bond will that affect bond type 9?

Thanks,
M. H. Rahman
  - Original Message - 
  From: Berk Hess 
  To: Discussion list for GROMACS users 
  Sent: Friday, October 09, 2009 10:02 AM
  Subject: RE: [gmx-users] user defined potential function for 1-4 interaction


  Hi,

  Unfortunately this is not possible.
  If you do not have to many pairs, you can change all (or all minus one type)
  from pairs to tabulated bonds (bonds type 9) in your topology.
  Then you can supply as many different bond tables as you like.
  Note that this will supply a single potential though,
  not separate Coulomb, dispersion and repulsion tables.

  Berk


--
  From: mhrah...@dal.ca
  To: gmx-users@gromacs.org
  Subject: Re: [gmx-users] user defined potential function for 1-4 interaction
  Date: Fri, 9 Oct 2009 09:48:19 -0300


  I think there must be a way in gromacs to pass tabulated potenttial for 1-4 
interaction for two groups as interaction between different pairs can be 
significantly different and can change the structure of an indiviual molecule. 
  I would request:  Please let me know if it is possible to pass tabulated 
potential for pair inteaction for two groups. if my method, which you will see 
below, is wrong please let me know the correct way. I searched previous 
communications regarding tabulated potential but could not get my answer. I 
hope I am not wasing your time.

  Thanks.


  - Original Message - 
From: LuLanyuan 
To: gmx-users@gromacs.org 
Sent: Thursday, October 08, 2009 8:04 PM
Subject: RE: [gmx-users] user defined potential function for 1-4 interaction


Hi,
As I remember, you can only use one table for 1-4 interactions. Don't know 
if it's changed
in the latest version.
Lanyuan

 From: mhrah...@dal.ca
 To: gmx-users@gromacs.org
 Subject: Re: [gmx-users] user defined potential function for 1-4 
interaction
 Date: Thu, 8 Oct 2009 19:10:39 -0300
 
 Hi all:
 I posted this earlier but did not get any help I really need to slove 
this 
 issue.
 
 What should be the way to pass a formatted table for the 1-4 interaction
 for two or more different groups? Reading page 150 and 180 of manual 4.0, 
 I
 understand user defined potential functions can be passed for many groups
 using energygrp_table in .mdp file but nothing is clearly mentioned
 regarding pair interaction
 
 I have two grps for 1-4 interactions MTN and SFT.
 mdrun command includes:
 -table table.xvg -tablep pair.xvg
 ; .mdp file contains,
 energygrps = MTN SFT
 energygrp_table: MTN MTN MTN SFT
 
 I passed three tables for pair interaction in the
 name pair.xvg, pair_MTN_MTN.xvg and pair_MTN_SFT.xvg.
 I see the later two tabels are not recognized. If pair_MTN_MTN.xvg and 
 pair_MTN_SFT.xvg are not supplied GROMACS donot issue any warning.
 I am afraid that I failed to submit separate table for pair interaction 
 properly in this way.
 
 Thanks,
 M.H.Rahman 
 
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Re: [gmx-users] user defined potential function for 1-4 interaction

2009-10-09 Thread M Hafizur Rahman
I think there must be a way in gromacs to pass tabulated potenttial for 1-4 
interaction for two groups as interaction between different pairs can be 
significantly different and can change the structure of an indiviual molecule. 
I would request:  Please let me know if it is possible to pass tabulated 
potential for pair inteaction for two groups. if my method, which you will see 
below, is wrong please let me know the correct way. I searched previous 
communications regarding tabulated potential but could not get my answer. I 
hope I am not wasing your time.

Thanks.


- Original Message - 
  From: LuLanyuan 
  To: gmx-users@gromacs.org 
  Sent: Thursday, October 08, 2009 8:04 PM
  Subject: RE: [gmx-users] user defined potential function for 1-4 interaction


  Hi,
  As I remember, you can only use one table for 1-4 interactions. Don't know if 
it's changed
  in the latest version.
  Lanyuan

   From: mhrah...@dal.ca
   To: gmx-users@gromacs.org
   Subject: Re: [gmx-users] user defined potential function for 1-4 interaction
   Date: Thu, 8 Oct 2009 19:10:39 -0300
   
   Hi all:
   I posted this earlier but did not get any help I really need to slove this 
   issue.
   
   What should be the way to pass a formatted table for the 1-4 interaction
   for two or more different groups? Reading page 150 and 180 of manual 4.0, 
   I
   understand user defined potential functions can be passed for many groups
   using energygrp_table in .mdp file but nothing is clearly mentioned
   regarding pair interaction
   
   I have two grps for 1-4 interactions MTN and SFT.
   mdrun command includes:
   -table table.xvg -tablep pair.xvg
   ; .mdp file contains,
   energygrps = MTN SFT
   energygrp_table: MTN MTN MTN SFT
   
   I passed three tables for pair interaction in the
   name pair.xvg, pair_MTN_MTN.xvg and pair_MTN_SFT.xvg.
   I see the later two tabels are not recognized. If pair_MTN_MTN.xvg and 
   pair_MTN_SFT.xvg are not supplied GROMACS donot issue any warning.
   I am afraid that I failed to submit separate table for pair interaction 
   properly in this way.
   
   Thanks,
   M.H.Rahman 
   
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RE: [gmx-users] user defined potential function for 1-4 interaction

2009-10-09 Thread Berk Hess

Hi,

Unfortunately this is not possible.
If you do not have to many pairs, you can change all (or all minus one type)
from pairs to tabulated bonds (bonds type 9) in your topology.
Then you can supply as many different bond tables as you like.
Note that this will supply a single potential though,
not separate Coulomb, dispersion and repulsion tables.

Berk

From: mhrah...@dal.ca
To: gmx-users@gromacs.org
Subject: Re: [gmx-users] user defined potential function for 1-4 interaction
Date: Fri, 9 Oct 2009 09:48:19 -0300










I think there must be a way in gromacs to pass tabulated 
potenttial for 1-4 interaction for two groups as interaction between 
different pairs can be significantly different and can change the structure of 
an indiviual molecule. 
I would request:  Please let me know if it is 
possible to pass tabulated potential for pair inteaction for two groups. if 
my method, which you will see below, is wrong please let me know the 
correct way. I searched previous communications regarding tabulated potential 
but could not get my answer. I hope I am not wasing your time.
 
Thanks.
 
 
- Original Message - 

  From: 
  LuLanyuan 

  To: gmx-users@gromacs.org 
  Sent: Thursday, October 08, 2009 8:04 
  PM
  Subject: RE: [gmx-users] user defined 
  potential function for 1-4 interaction
  
Hi,
As I remember, you can only use one table for 1-4 
  interactions. Don't know if it's changed
in the latest 
  version.
Lanyuan

 From: mhrah...@dal.ca
 To: gmx-users@gromacs.org
 Subject: 
  Re: [gmx-users] user defined potential function for 1-4 interaction
 
  Date: Thu, 8 Oct 2009 19:10:39 -0300
 
 Hi all:
 I posted 
  this earlier but did not get any help I really need to slove this 
 
  issue.
 
 What should be the way to pass a formatted table for 
  the 1-4 interaction
 for two or more different groups? Reading page 150 
  and 180 of manual 4.0, 
 I
 understand user defined potential 
  functions can be passed for many groups
 using energygrp_table in .mdp 
  file but nothing is clearly mentioned
 regarding pair 
  interaction
 
 I have two grps for 1-4 interactions MTN and 
  SFT.
 mdrun command includes:
 -table table.xvg -tablep 
  pair.xvg
 ; .mdp file contains,
 energygrps = MTN SFT
 
  energygrp_table: MTN MTN MTN SFT
 
 I passed three tables for 
  pair interaction in the
 name pair.xvg, pair_MTN_MTN.xvg and 
  pair_MTN_SFT.xvg.
 I see the later two tabels are not recognized. If 
  pair_MTN_MTN.xvg and 
 pair_MTN_SFT.xvg are not supplied GROMACS donot 
  issue any warning.
 I am afraid that I failed to submit separate table 
  for pair interaction 
 properly in this way.
 
 
  Thanks,
 M.H.Rahman 
 
 
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Re: [gmx-users] user defined potential function for 1-4 interaction

2009-10-08 Thread M Hafizur Rahman

Hi all:
I posted this earlier but did not get  any help I really need to slove this 
issue.


What should be the way to pass a formatted table for the 1-4 interaction
for two or more different groups? Reading  page 150  and 180 of manual 4.0, 
I

understand user defined potential functions can be passed for many groups
using  energygrp_table in .mdp file but nothing is clearly mentioned
regarding pair interaction

I have two grps for 1-4 interactions MTN and SFT.
mdrun command includes:
-table table.xvg   -tablep pair.xvg
.mdp file contains,
energygrps = MTN SFT
energygrp_table: MTN MTN MTN SFT

I  passed three tables for pair interaction in the
name pair.xvg,  pair_MTN_MTN.xvg and  pair_MTN_SFT.xvg.
I see the later two tabels are not recognized. If pair_MTN_MTN.xvg and 
pair_MTN_SFT.xvg are not supplied GROMACS donot issue any warning.
I am afraid that I failed to submit  separate table for pair interaction 
properly in this way.


Thanks,
M.H.Rahman 


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RE: [gmx-users] user defined potential function for 1-4 interaction

2009-10-08 Thread LuLanyuan

Hi,
As I remember, you can only use one table for 1-4 interactions. Don't know if 
it's changed
in the latest version.
Lanyuan

 From: mhrah...@dal.ca
 To: gmx-users@gromacs.org
 Subject: Re: [gmx-users] user defined potential function for 1-4 interaction
 Date: Thu, 8 Oct 2009 19:10:39 -0300
 
 Hi all:
 I posted this earlier but did not get  any help I really need to slove this 
 issue.
 
 What should be the way to pass a formatted table for the 1-4 interaction
  for two or more different groups? Reading  page 150  and 180 of manual 4.0, 
 I
  understand user defined potential functions can be passed for many groups
  using  energygrp_table in .mdp file but nothing is clearly mentioned
  regarding pair interaction
 
 I have two grps for 1-4 interactions MTN and SFT.
 mdrun command includes:
 -table table.xvg   -tablep pair.xvg
 .mdp file contains,
 energygrps = MTN SFT
 energygrp_table: MTN MTN MTN SFT
 
 I  passed three tables for pair interaction in the
  name pair.xvg,  pair_MTN_MTN.xvg and  pair_MTN_SFT.xvg.
 I see the later two tabels are not recognized. If pair_MTN_MTN.xvg and 
 pair_MTN_SFT.xvg are not supplied GROMACS donot issue any warning.
 I am afraid that I failed to submit  separate table for pair interaction 
 properly in this way.
 
 Thanks,
 M.H.Rahman 
 
 ___
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 Please search the archive at http://www.gromacs.org/search before posting!
 Please don't post (un)subscribe requests to the list. Use the 
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