Hi Francesco

That number corresponds to a type for each cmap-entry. The idea (iirc, it was 
some time ago) was that it could be useful to be able to have multiple 
cmap-types (other grid values, different grid spacing etc) for the same 
cmap-dihedral (much like different torsions etc...), but based on a quick look 
in the code, the support for that is very limited. It should probably not be 
touched right now.

Cheers
/Per


19 feb 2013 kl. 15:43 skrev francesco oteri:

> Dear gromacs users,
> I am trying to figure out the meaning of the cmaptypes section in file
> section.
> As far as I understood, taking the following entry as example:
> 
> C NH1 CT1 C NH1 1 24 24\
> 
> C NH1 CT1 C   = phi
> H1 CT1 C NH1 = psi
> 
> 24*24 = dimension of the grid
> 
> My question is: what does the 1 mean?
> 
> Best,
> Francesco
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