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Action:
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Performs a Boolean subtract operation of two graphs.
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Filename:
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kern/kern_scm/graph_scm.cxx
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Syntax:
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(graph:subtract in-graph1 in-graph2 in-keep)
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Arg Types:
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in-graph1
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graph
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in-graph2
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graph
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in-keep
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boolean
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Returns:
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graph
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in-graph1 and
in-graph2 specifies the graph.
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The
in-keep argument with a value true (#t) specifies that the edges going to common elements are kept.
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Example:
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; graph:subtract
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; Create some simple graphs.
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(define g1 (graph "I-me me-myself myself-mine I-we
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we-us us-them"))
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;; g1
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(define g2 (graph "he-she it-thing they-those us-we
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them-us"))
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;; g2
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(define g3 (graph:subtract g1 g2 #f))
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;; g3
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(define g4 (graph:subtract g2 g1 #f))
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;; g4
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(define g5 (graph:subtract g2 g1 #t))
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;; g5
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