DUMPFORCES

This is part of the generic module

Dump the force acting on one of a values in a file.

For a CV this command will dump the force on the CV itself. Be aware that in order to have the forces on the atoms you should multiply the output from this argument by the output from DUMPDERIVATIVES. Furthermore, also note that you can output the forces on multiple quantities simultaneously by specifying more than one argument. You can control the buffering of output using the FLUSH keyword.

Examples

The following input instructs plumed to write a file called forces that contains the force acting on the distance between atoms 1 and 2.

Click on the labels of the actions for more information on what each action computes

distance: DISTANCE 
ATOMS
the pair of atom that we are calculating the distance between. 
=1,2 The DISTANCE action with label distance calculates a single scalar value
DUMPFORCES 
ARG
compulsory keyword 
the labels of the values whose forces should be output 
=distance 
STRIDE
compulsory keyword ( default=1 )
the frequency with which the forces should be output 
=1 
FILE
compulsory keyword 
the name of the file on which to output the forces 
=forces The DUMPFORCES action with label 

Glossary of keywords and components

Compulsory keywords

ARG	the labels of the values whose forces should be output
STRIDE	( default=1 ) the frequency with which the forces should be output
FILE	the name of the file on which to output the forces
FMT	( default=%15.10f ) the format with which the derivatives should be output

Options

RESTART	allows per-action setting of restart (YES/NO/AUTO)
UPDATE_FROM	Only update this action from this time
UPDATE_UNTIL	Only update this action until this time