---
name: "nauty-addptg"
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-addptg"
---

# nauty-addptg(1)

add additional vertices in various ways

## NAME

nauty-addptg - add additional vertices in various ways

## SYNOPSIS

**addptg** \[*-lq*\] \[*-n#*\] \[*-j#:#*\] \[*-e#:#*\] \[*-ck*\] \[*-io*\] \[*infile* \[*outfile*\]\]

## DESCRIPTION

-

  Add a specified number of new vertices

-

  The output file has a header if and only if the input file does.

- **-l**

  canonically label outputs

- **-c**

  join each new vertex to all the old vertices

- **-k**

  make a clique on the set of new vertices

**-n**# the number of new vertices (default 1)

**-j**# **-j**#:# join a new vertex to # old vertices in all possible ways

**-e**# **-e**#:# use all joins that give the new graphs # edges

-

  (**-j**, **-e** are each incompatible with **-n**)

- **-i**

  for a digraph, edges go towards the old vertices

- **-o**

  for a digraph, edges go away from the old vertices

-

  (**-i** is the default if neither **-i** nor **-o** is given)

- **-q**

  Suppress auxiliary information