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UNFLATTEN(1) General Commands Manual UNFLATTEN(1)


unflatten - adjust directed graphs to improve layout aspect ratio


unflatten [-f] [-llen] [-clen ] [ -o outfile ] [ files ]


unflatten is a preprocessor to dot that is used to improve the aspect ratio of graphs having many leaves or disconnected nodes. The usual layout for such a graph is generally very wide or tall. unflatten inserts invisible edges or adjusts the minlen on edges to improve layout compaction.


The following options are supported:

The minimum length of leaf edges is staggered between 1 and len (a small integer).
Enables the staggering of the -l option to fanout nodes whose indegree and outdegree are both 1. This helps with structures such as a -> {w x y z} -> b. This option only works if the -l flag is set.
Form disconnected nodes into chains of up to len nodes.
causes the output to be written to the specified file; by default, output is written to stdout.


The following operand is supported:

Names of files containing 1 or more graphs in dot format. If no files operand is specified, the standard input will be used.


Stephen C. North <>
Emden R. Gansner <>


gc(1), dot(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), tred(1), libgraph(3)

21 January 2001