2014-12-01 18:11 GMT-07:00 Vitalie Botan <[email protected]>:
> Hi there,
>
> I have a Lammps trajectory and corresponding topology and mapping XML files,
> so everything seems to work fine with csg_boltzmann and csg_stat scripts and
> I am able to generate CG-tables both for bonded and non-bonded interactions.
> However, when I try to convert  resampled and extrapolated bonded potential
> with the following script csg_call convert_potential lammps
> got this message:
>
> ERROR:
>
> potential_to_generic.sh: conversion of bonded interaction to generic tables
> is not implemented yet!
Most of the code is already there, it is just not enabled, because I
have never used tabulated bonded interaction in LAMMPS.
Do you have a specification for LAMMPS'  bonded tables? (i.e. what's
in the 1st, 2nd, 3rd column for bond, angle and dihedral tables?)

>
>
> Is there any proper way to prepare a smoothed extrapolated bonded potential
> for Lammps?
You could use csg_call convert_potential gromacs instead, gromacs'
bonded tables are just three columns. (r, U(r), F(r))

 I've tried csg_resample with --derivative option together with
> the smoothed potential from csg_boltzmann output, but all the table values
> were marked with "o" sign, meaning they will be extrapolated later, and
> exactly this scenario one has to avoid when preparing tabulated potential
> for Lammps.
You could change it by hand from "o" to "i", or run the
csg_call potential extrapolate [OPTIONS] input output

Christoph


>
> --Vitalie
>
>
> PS: I am using 1.3-dev version of votca.
>
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-- 
Christoph Junghans
Web: http://www.compphys.de

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