# compute bond command

## Syntax

``` LAMMPS
compute ID group-ID bond
```

-   ID, group-ID are documented in [compute](compute) command
-   bond = style name of this compute command

## Examples

``` LAMMPS
compute 1 all bond
```

## Description

Define a computation that extracts the bond energy calculated by each of
the bond sub-styles used in the [bond_style hybrid](bond_hybrid)
command. These values are made accessible for output or further
processing by other commands. The group specified for this command is
ignored.

This compute is useful when using [bond_style hybrid](bond_hybrid) if
you want to know the portion of the total energy contributed by one or
more of the hybrid sub-styles.

## Output info

This compute calculates a global vector of length $N$, where $N$ is the
number of sub_styles defined by the [bond_style hybrid](bond_style)
command, which can be accessed by indices 1 through $N$. These values
can be used by any command that uses global scalar or vector values from
a compute as input. See the [Howto output](Howto_output) page for an
overview of LAMMPS output options.

The vector values are \"extensive\" and will be in energy
[units](units).

## Restrictions

> none

## Related commands

[compute pe](compute_pe), [compute pair](compute_pair)

## Default

none