Am 20. Dezember 2011 03:49 schrieb Javier Ramos <[email protected]>:
> I am trying to perform the simulation with the propane example in the
> tutorials. I have two questions concerning the table_a1.xvg file
> containing the tabulated potential.
>
>  i) The second column contains the potential, I am assuming that the
> units are in kJ/mol (gromacs units), is that correct?
Yes, correct!

>  ii) The third column (force) is zero in the whole angle interval.
> Why?
Gromacs calculates the forces internally if all forces are zero.
In case you give forces, it will warn you if the force deviate too
much from the calculates ones.

A side note: VOTCA (csg_boltzmann,csg_stat) calculates in rad, while
gromacs uses degree.


Christoph
>
> Best regards,
> Javi
>
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-- 
Christoph Junghans
Web: http://www.compphys.de

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