floyd.warshall.all.pairs.sp {RBGL} | R Documentation

## compute shortest paths for all pairs of nodes

### Description

compute shortest paths for all pairs of nodes

### Usage

    floyd.warshall.all.pairs.sp(g)

### Arguments

`g` | graph object with edge weights given

### Details

Compute shortest paths between every pair of vertices for a dense graph. It works on both undirected and directed graph. The result is given as a distance matrix. The matrix is symmetric for an undirected graph, and asymmetric (very likely) for a directed graph. For a sparse graph, the `johnson.all.pairs.sp` functions should be used instead.

See documentation on these algorithms in Boost Graph Library for more details.

### Value

A matrix of shortest path lengths between all pairs of nodes in the graph.

### Author(s)

Li Long <li.long@isb-sib.ch>

### 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

`johnson.all.pairs.sp`

### Examples

    con <- file(system.file("XML/conn.gxl", package="RBGL"), open="r")
    coex <- fromGXL(con)
    close(con)
    floyd.warshall.all.pairs.sp(coex)

[Package RBGL version 1.58.2 Index]