---
name: "nauty-nbrhoodg"
section: "1"
platform: "linux"
package: "nauty"
version: "2.8.9+ds-1+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nauty-nbrhoodg"
---

# nauty-nbrhoodg(1)

extract neighbourhoods of vertices

## NAME

nauty-nbrhoodg - extract neighbourhoods of vertices

## SYNOPSIS

**nbrhoodg** \[*-lq*\] \[*-c\|-C*\] \[*-d#\|d#:#*\] \[*-v#\|-v#:#*\] \[*infile* \[*outfile*\]\]

## DESCRIPTION

-

  Extract neighbours of vertices of a graph.

-

  The output file has a header if and only if the input file does. No isomorph reduction is done.

- **-l**

  Canonically label outputs (default is same labelling as input)

- **-C**

  Extract closed neighbourhoods instead.

- **-c**

  Extract non-neighbourhoods instead.

**-d**# **-d**#:# Only include vertices with original degree in the given range

**-v**# **-v**#:# Only include vertices with these vertex numbers (first is 0).

-

  No empty graphs are output. For digraphs, out-degree and out-neighbourhoods are used.

- **-q**

  Suppress auxiliary information