"LAMMPS WWW Site"_lws - "LAMMPS Documentation"_ld - "LAMMPS Commands"_lc :c

:link(lws,http://lammps.sandia.gov)
:link(ld,Manual.html)
:link(lc,Section_commands.html#comm)

:line

fix com command :h3

[Syntax:]

fix ID group-ID com N file :pre

ID, group-ID are documented in "fix"_fix.html command
com = style name of this fix command
N = compute center-of-mass every this many timesteps
file = filename to write center-of-mass info to :ul

[Examples:]

fix 1 all com 100 com.out :pre

[Description:]

Compute the center-of-mass of the group of atoms every N steps,
including all effects due to atoms passing thru periodic boundaries.
Write the results to the specified file.

[Restart, fix_modify, output, run start/stop, minimize info:]

No information about this fix is written to "binary restart
files"_restart.html.  None of the "fix_modify"_fix_modify.html options
are relevant to this fix.  No global scalar or vector or per-atom
quantities are stored by this fix for access by various "output
commands"_Section_howto.html#4_15.  No parameter of this fix can be
used with the {start/stop} keywords of the "run"_run.html command.
This fix is not invoked during "energy minimization"_minimize.html.

[Restrictions:] none

[Related commands:] none

[Default:] none