topo_sort

0th

Percentile

Topological sorting of vertices in a graph

A topological sorting of a directed acyclic graph is a linear ordering of its nodes where each node comes before all nodes to which it has edges.

Keywords
graphs
Usage
topo_sort(graph, mode = c("out", "all", "in"))
Arguments
graph

The input graph, should be directed

mode

Specifies how to use the direction of the edges. For “out”, the sorting order ensures that each node comes before all nodes to which it has edges, so nodes with no incoming edges go first. For “in”, it is quite the opposite: each node comes before all nodes from which it receives edges. Nodes with no outgoing edges go first.

Details

Every DAG has at least one topological sort, and may have many. This function returns a possible topological sort among them. If the graph is not acyclic (it has at least one cycle), a partial topological sort is returned and a warning is issued.

Value

A numeric vector containing vertex ids in topologically sorted order.

Aliases
  • topo_sort
  • topological.sort
Examples
# NOT RUN {
g <- barabasi.game(100)
topo_sort(g)
# }
Documentation reproduced from package igraph, version 1.0.1, License: GPL (>= 2)

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