2014-05-13 18:39 GMT-06:00 Marc Segovia <[email protected]>:
> Hi
>
>
> In settings.xml when a target distribution need be specified,  you can  use
> atomistic rdf from gromacs (for example) or use a coarse grain rdf generated
> from atomistic dynamics, using csg_stat, but including coarse grain mapping.
>  Both are close but not equal, which one must be prefered ?
First of all, g_rdf and csg_stat produce identical results if the bin
size of the rdf is the same. We have tested that a lot of times.
Of course you have to make sure to use the same mapping - g_rdf only
supports molecule center of mass (-rdf mol_com option) and center of
geometry.

That said, I am not sure what you mean by "atomistic rdf". VOTCA will
fit whatever you give it as a target, physically meaningful or not,
but to make sense the rdf should be calculated between the
coarse-grained site of a mapped atomistic trajectory.

Christoph


>
> Thanking in advance your help.
>
> Marc
>
> Dr. Marc Segovia
> CCBG-DETEMA
> Facultad de Quimica
> Universidad de la Republica
> 11800 Montevideo
> Uruguay
>
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-- 
Christoph Junghans
Web: http://www.compphys.de

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