# compute dihedral command

## Syntax

``` LAMMPS
compute ID group-ID dihedral
```

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

## Examples

``` LAMMPS
compute 1 all dihedral
```

## Description

Define a computation that extracts the dihedral energy calculated by
each of the dihedral sub-styles used in the [dihedral_style
hybrid](dihedral_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 [dihedral_style
hybrid](dihedral_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 [dihedral_style
hybrid](dihedral_style) command, which can be accessed by the 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