GHOST
 This is part of the vatom module

Calculate the absolute position of a ghost atom with fixed coordinates in the local reference frame formed by three atoms.

The computed ghost atom is stored as a virtual atom that can be accessed in an atom list through the the label for the GHOST action that creates it.

Examples

The following input instructs plumed to print the distance between the ghost atom and the center of mass for atoms 15,20:

Click on the labels of the actions for more information on what each action computes
c1: GHOST ATOMSthe list of atoms which are involved the virtual atom's definition. =1,5,10 COORDINATEScoordinates of the ghost atom in the local reference frame. =10.0,10.0,10.0
c2: COM ATOMSthe list of atoms which are involved the virtual atom's definition. =15,20
d1: DISTANCE ATOMSthe pair of atom that we are calculating the distance between. =c1,c2
PRINT ARGthe input for this action is the scalar output from one or more other actions. =d1

Glossary of keywords and components
The atoms involved can be specified using
 ATOMS the list of atoms which are involved the virtual atom's definition. For more information on how to specify lists of atoms see Groups and Virtual Atoms COORDINATES coordinates of the ghost atom in the local reference frame. For more information on how to specify lists of atoms see Groups and Virtual Atoms