PRINT_NDX
This is part of the generic module

Print an ndx file

Examples
Glossary of keywords and components
The atoms involved can be specified using
ATOMS the list of atoms that have the corresponding arguments. For more information on how to specify lists of atoms see Groups and Virtual Atoms
Compulsory keywords
STRIDE ( default=1 ) the frequency with which the quantities of interest should be output
Options
ARG the labels of vectors that should be used when printind the NDX file
FILE the name of the file on which to output these quantities
LESS_THAN_OR_EQUAL when printing with arguments that are vectors only print components of vectors have a value less than or equal to this value
GREATER_THAN_OR_EQUAL when printing with arguments that are vectors only print components of vectors have a value greater than or equal to this value
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