---
name: "nauty-copyg"
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-copyg"
---

# nauty-copyg(1)

convert format and select subset

## NAME

nauty-copyg - convert format and select subset

## SYNOPSIS

**copyg** \[*-gszfp#:#qhx*\] \[*infile* \[*outfile*\]\]

## DESCRIPTION

-

  Copy a file of graphs with possible format conversion.

- **-g**

  Use graph6 format for output

- **-s**

  Use sparse6 format for output

- **-z**

  Use digraph6 format for output

- **-i**

  Use incremental sparse6 format for output

-

  In the absence of **-g**, **-s**, **-z** or **-i**, the format depends on the header or, if none, the first input line. As an exception, digraphs are always written in digraph6.

**-p**# **-p**#:#

-

  Specify range of input lines (first is 1) This can fail if the input has incremental lines.

- **-f**

  With **-p**, assume input lines of fixed length

-

  (ignored if header or first line has sparse6 format).

- **-I**#

  Have at most this number of incremental steps

- in a row.

  Implies **-i**.

- **-h**

  Write a header.

- **-x**

  Don't write a header.

-

  In the absence of **-h** and **-x**, a header is written if there is one in the input.

- **-q**

  Suppress auxiliary output.