---
name: "nauty-dretog"
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-dretog"
---

# nauty-dretog(1)

read graphs in dreadnaut format

## NAME

nauty-dretog - read graphs in dreadnaut format

## SYNOPSIS

**dretog** \[*-n#o#sghq*\] \[*infile* \[*outfile*\]\]

## DESCRIPTION

-

  Read graphs in dreadnaut format.

- **-o**#

  Label vertices starting at # (default 0). This can be overridden in the input.

- **-n**#

  Set the initial graph order to # (no default). This can be overridden in the input.

- **-g**

  Use graph6 format (default for undirected graphs).

- **-z**

  Use digraph6 format (default for directed graphs).

- **-s**

  Use sparse6 format.

- **-h**

  Write a header (according to **-g**, **-z** or **-s**).

- **-q**

  Suppress auxiliary output.

-

  Input consists of a sequence of dreadnaut commands restricted to:

- n=#

  set number of vertices (no default) The = is optional.

- $=#

  set label of first vertex (default 0) The = is optional.

- d

  indicate graph will be directed

- $$

  return origin to initial value (see **-o**#)

- ".." and !..\\n

  comments to ignore

- g

  specify graph to follow (as dreadnaut format) Can be omitted if first character of graph is a digit or ';'.

- q

  exit (optional)