.. index:: partition

partition command
=================

Syntax
""""""

.. parsed-literal::

   partition style N command ...

* style = *yes* or *no*
* N = partition number (see asterisk form below)
* command = any LIGGGHTS(R)-PUBLIC command

Examples
""""""""

.. parsed-literal::

   partition yes 1 processors 4 10 6
   partition no 5 print "Active partition"
   partition yes *5 fix all nve

Description
"""""""""""

This command invokes the specified command on a subset of the
partitions of processors you have defined via the -partition
command-line switch.  See :ref:`Section_start 6 <start_7>`
for an explanation of the switch.

Normally, every input script command in your script is invoked by
every partition.  This behavior can be modified by defining world- or
universe-style :doc:`variables <variable>` that have different values
for each partition.  This mechanism can be used to cause your script
to jump to different input script files on different partitions, if
such a variable is used in a :doc:`jump <jump>` command.

The "partition" command is another mechanism for having as input
script operate differently on different partitions.  It is basically a
prefix on any LIGGGHTS(R)-PUBLIC command.  The commmand will only be invoked on
the partition(s) specified by the *style* and *N* arguments.

If the *style* is *yes*, the command will be invoked on any partition
which matches the *N* argument.  If the *style* is *no* the command
will be invoked on all the partitions which do not match the Np
argument.

Partitions are numbered from 1 to Np, where Np is the number of
partitions specified by the :ref:`-partition command-line switch <start_7>`.

*N* can be specified in one of two ways.  An explicit numeric value
can be used, as in the 1st example above.  Or a wild-card asterisk can
be used to span a range of partition numbers.  This takes the form "*"
or "*n" or "n*" or "m*n".  An asterisk with no numeric values means
all partitions from 1 to Np.  A leading asterisk means all partitions
from 1 to n (inclusive).  A trailing asterisk means all partitions
from n to Np (inclusive).  A middle asterisk means all partitions from
m to n (inclusive).

Restrictions
""""""""""""
 none

**Related commands:** none

**Default:** none


.. _liws: http://www.cfdem.com
.. _ld: Manual.html
.. _lc: Section_commands.html#comm