GRID_TO_XYZ
This is part of the gridtools module

Output the function on the grid to an xyz file

Examples
Glossary of keywords and components
Compulsory keywords
GRID the action that creates the grid you would like to output
STRIDE ( default=0 ) the frequency with which the grid should be output to the file. The default value of 0 ensures that the grid is only output at the end of the trajectory
FILE ( default=density ) the file on which to write the grid.
REPLICA ( default=0 ) the replica for which you would like to output this information
UNITS ( default=PLUMED ) the units in which to print out the coordinates. PLUMED means internal PLUMED units
Options
COMPONENT if your input is a vector field use this to specify the component of the input vector field for which you wish to output
PRECISION The number of digits in trajectory file