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Action:
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Returns the number of the component that a given graph element belongs to.
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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:which-component in-graph in-object)
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Arg Types:
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in-graph
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graph
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in-object
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string | entity
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Returns:
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integer
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Description:
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This extension is useful if the given
in-graph has multiple components. It determines which component a given
in-object is part of and returns its component number. The
graph:component command then creates a new graph from just the elements of a single component.
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in-graph specifies a graph.
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in-object specifies a component. The component is selected by providing a string which is the name of an element of the component or an entity which is associated with an element of the component.
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Example:
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; graph:which-component
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; Create a simple example
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(define g1 (graph "me-you us-them
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we-they them-they
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FIDO-SPOT SPOT-KING SPOT-PETEY"))
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;; g1
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; CAREFUL: The order of the graph output may
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; not be the same each time.
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(graph:components g1)
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;; 3
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(graph:which-component g1 "me")
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;; 2
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(define g2 (graph:component g1 2))
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;; g2
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(define g3 (graph:component g1 "me"))
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;; g3
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