mirror of https://gitee.com/bigwinds/arangodb
59 lines
2.2 KiB
Markdown
59 lines
2.2 KiB
Markdown
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@brief Get the
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[betweenness](http://en.wikipedia.org/wiki/Betweenness_centrality)
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of all vertices in the graph.
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`graph._absoluteBetweenness(vertexExample, options)`
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The complexity of the function is described
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[here](../Aql/GraphOperations.md#the-complexity-of-the-shortest-path-algorithms).
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@PARAMS
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@PARAM{vertexExample, object, optional}
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Filter the vertices, see [Definition of examples](#definition-of-examples)
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@PARAM{options, object, optional}
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An object defining further options. Can have the following values:
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* *direction*: The direction of the edges. Possible values are *outbound*, *inbound* and *any* (default).
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* *weight*: The name of the attribute of the edges containing the weight.
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* *defaultWeight*: Only used with the option *weight*.
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If an edge does not have the attribute named as defined in option *weight* this default
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is used as weight.
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If no default is supplied the default would be positive infinity so the path and
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hence the betweeness can not be calculated.
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@EXAMPLES
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A route planner example, the absolute betweenness of all locations.
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@EXAMPLE_ARANGOSH_OUTPUT{generalGraphModuleAbsBetweenness1}
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var examples = require("@arangodb/graph-examples/example-graph.js");
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var graph = examples.loadGraph("routeplanner");
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graph._absoluteBetweenness({});
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~ examples.dropGraph("routeplanner");
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@END_EXAMPLE_ARANGOSH_OUTPUT
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A route planner example, the absolute betweenness of all locations.
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This considers the actual distances.
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@EXAMPLE_ARANGOSH_OUTPUT{generalGraphModuleAbsBetweenness2}
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var examples = require("@arangodb/graph-examples/example-graph.js");
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var graph = examples.loadGraph("routeplanner");
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graph._absoluteBetweenness({weight : 'distance'});
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~ examples.dropGraph("routeplanner");
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@END_EXAMPLE_ARANGOSH_OUTPUT
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A route planner example, the absolute betweenness of all cities regarding only
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outbound paths.
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@EXAMPLE_ARANGOSH_OUTPUT{generalGraphModuleAbsBetweenness3}
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var examples = require("@arangodb/graph-examples/example-graph.js");
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var graph = examples.loadGraph("routeplanner");
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graph._absoluteBetweenness({direction : 'outbound', weight : 'distance'});
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~ examples.dropGraph("routeplanner");
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@END_EXAMPLE_ARANGOSH_OUTPUT
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