NAUTY-SHOWG(1)

✨ NAME ✨

nauty-showg — a graph-processing utility from the nauty suite 🦋 (yes bestie, this is the one that makes graphs actually readable)

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🌸 SYNOPSIS 🌸

showg [-p#:#l#o#Ftq] [-a|-A|-c|-d|-e] [infile [outfile]]

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💖 DESCRIPTION 💖

Okay so. This little icon writes graphs in human-readable format. That's the whole vibe. You feed it a graph, it shows you the graph. Gorgeous.

infile is the input file in graph6, sparse6 or digraph6 format.

🚨 not me being the bearer of bad news: this program does not support incremental sparse6 files. Use listg for that, bestie. iykyk.

outfile is the output file. Defaults are standard input and standard output — so if you give it nothing, it just sits there politely reading from stdin and yelling at stdout. main character energy fr fr.

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👑 OPTIONS 👑

• -p#, -p#:#, -p#-# — only display one graph, or a sequence of graphs. The first graph is number 1. A second number which is empty or zero means infinity. 💀 (yes, infinity. she's dramatic like that.)
• -a — write the adjacency matrix.
• -A — same as -a but with a space between entries. Breathing room. self-care. 🫶
• -d — write output to satisfy dreadnaut.
• -c — write compact dreadnaut form with minimal line-breaks. crunching it. ate.
• -e — write a list of edges, preceded by the order and the number of edges.
• -o# — specify number of first vertex (default is 0). lowkey important, don't skip it.
• -t — write upper triangle only (affects -a, -A, -d and default). 🔥
• -F — write a form-feed after each graph except the last.
• -l# — specify screen width limit (default 78, 0 means no limit).

⚠️ heads up: this is not currently implemented with -a or -A. so don't come for her about it. 💅

• -q — suppress auxiliary output. quiet. mysterious. 🎀

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🌈 important bestie alert: -a, -A, -c, -d and -e are incompatible. pick one. she's monogamous. periodt.

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and that's the whole page, bestie 💜 this was nauty-showg version 2.9.3, dated January 2026 — go forth and read some graphs, you absolute legend 👑✨