TRED - Online Linux Manual PageSection : 1
Updated : 21 March 2001
NAMEtred − transitive reduction filter for directed graphs
SYNOPSIStred [ −vr? ] [ files ]
DESCRIPTIONtred computes the transitive reduction of directed graphs, and prints the resulting graphs to standard output. This removes edges implied by transitivity. Nodes and subgraphs are not otherwise affected. The ``meaning'' and validity of the reduced graphs is application dependent. tred is particularly useful as a preprocessor to dot to reduce clutter in dense layouts. Undirected graphs are silently ignored.
OPTIONSThe following options are supported: −v Verbose output to stderr. −r Print information of removed edges to stderr. −? Print usage information.
OPERANDSThe following operand is supported: files Names of files containing 1 or more graphs in dot format. If no files operand is specified, the standard input will be used.
BUGSUsing bitmaps internally would substantially decrease running time.
DIAGNOSTICSIf a graph has cycles, its transitive reduction is not uniquely defined. In this case tred emits a warning.
AUTHORSStephen C. North <north@research.att.com>
Emden R. Gansner <erg@research.att.com>
SEE ALSOgc(1), dot(1), acyclic(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), libgraph(3) 0
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