CentOS 7.0 - man page for gvcolor (centos section 1)

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GVCOLOR(1)									       GVCOLOR(1)

NAME
       gvcolor - flow colors through a ranked digraph
       ( previously known as colorize )

SYNOPSIS
       gvcolor [ files ]

USAGE
       dot file.gv | gvcolor | dot -T<format>

DESCRIPTION
       gvcolor	is  a  filter  that sets node colors from initial seed values.	Colors flow along
       edges from tail to head, and are averaged (as HSB  vectors)  at	nodes.	 The  graph  must
       already	have been processed by dot.  Appropriate choice of initial colors yields drawings
       in which node colors help to emphasize logical relationships between nodes, even when they
       are spread far apart in the layout.

       Initial	colors	must be set externally, using the color attribute of a node.  It is often
       effective to assign colors to a few key source or sink nodes, manually setting their  col-
       ors  by	editing  the  graph  file.   Color  names are as in dot(1): symbolic names or RGB
       triples.  It is best to choose some easily-distinguished but related colors; not necessar-
       ily  spaced evenly around the color wheel.  For example, blue_green, green, and light_yel-
       low looks better than red, green, blue.

       Certain graph attributes control the gvcolor algorithm.	flow=back reverses  the  flow  of
       colors from heads to tails.  saturation=.1,.9 (or any two numbers between 0 and 1) adjusts
       the color saturation linearly from least to greatest rank.  If Defcolor is set, this color
       value is applied to any node not otherwise colored.

EXIT STATUS
       The following exit values are returned:

       0   Successful completion.

       1   If nodes of the graph do not possess a ``pos'' attribute.

BUGS
       It would be nice to make the program work without relying on an initial pass through dot.

AUTHORS
       Stephen C. North <north@research.att.com>
       Emden R. Gansner <erg@research.att.com>

SEE ALSO
       gc(1), dot(1), gvpr(1), ccomps(1), sccmap(1), tred(1), libgraph(3)

					  21 March 2001 			       GVCOLOR(1)
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