is_weighted

0th

Percentile

Weighted graphs

In weighted graphs, a real number is assigned to each (directed or undirected) edge.

Keywords
graphs
Usage
is_weighted(graph)
Arguments
graph
The input graph.
Details

In igraph edge weights are represented via an edge attribute, called weight. The is_weighted function only checks that such an attribute exists. (It does not even checks that it is a numeric edge attribute.)

Edge weights are used for different purposes by the different functions. E.g. shortest path functions use it as the cost of the path; community finding methods use it as the strength of the relationship between two vertices, etc. Check the manual pages of the functions working with weighted graphs for details.

Value

  • A logical scalar.

Aliases
  • is.weighted
  • is_weighted
Examples
g <- make_ring(10)
shortest_paths(g, 8, 2)
E(g)$weight <- seq_len(ecount(g))
shortest_paths(g, 8, 2)
Documentation reproduced from package igraph, version 1.0.0, License: GPL (>= 2)

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