RBGL (version 1.48.1)

extractPath: convert a dijkstra.sp predecessor structure into the path joining two nodes

Description

determine a path between two nodes in a graph, using output of dijkstra.sp.

Usage

extractPath(s, f, pens)

Arguments

s

index of starting node in nodes vector of the graph from which pens was derived

f

index of ending node in nodes vector

pens

predecessor index vector as returned in the preds component of dijkstra.sp output

References

Boost Graph Library ( www.boost.org/libs/graph/doc/index.html )

The Boost Graph Library: User Guide and Reference Manual; by Jeremy G. Siek, Lie-Quan Lee, and Andrew Lumsdaine; (Addison-Wesley, Pearson Education Inc., 2002), xxiv+321pp. ISBN 0-201-72914-8

See Also

allShortestPaths

Examples

data(FileDep)
dd <- dijkstra.sp(FileDep)
extractPath(1,9,dd$pen)