compute nbond/atom command — LAMMPS documentation

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# compute nbond/atom command

## Syntax

    compute ID group-ID nbond/atom keyword value

- ID, group-ID are documented in compute command

- nbond/atom = style name of this compute command

- zero or more keyword/value pairs may be appended

- keyword = bond/type

      bond/type value = btype
        btype = bond type included in count

## Examples

    compute 1 all nbond/atom
    compute 1 all nbond/atom bond/type 2

## Description

Added in version 4May2022.

Define a computation that computes the number of bonds each atom is part of. Bonds which are broken are not counted in the tally. See the Howto broken bonds page for more information. The number of bonds will be zero for atoms not in the specified compute group. This compute does not depend on Newton bond settings.

If the keyword bond/type is specified, only bonds of btype are counted.

## Output info

This compute calculates a per-atom vector, which can be accessed by any command that uses per-atom values from a compute as input. See the Howto output doc page for an overview of LAMMPS output options.

## Restrictions

This compute is part of the BPM package. It is only enabled if LAMMPS was built with that package. See the Build package page for more info.

## Related commands

## Default

none