Get the ids of all the edges that are valid in a network

Returns a vector of valid edge ids (corresponding to non-NULL edges) for a network that may have some deleted edges.

Usage

valid.eids(x, ...)

# S3 method for class 'network'
valid.eids(x, ...)

Arguments

x: a network object, possibly with some deleted edges.
...: additional arguments to methods.

Value

a vector of integer ids corresponding to the non-null edges in x

Details

The edge ids used in the network package are positional indices on the internal "mel" list. When edges are removed using delete.edges NULL elements are left on the list. The function valid.eids returns the ids of all the valid (non-null) edge ids for its network argument.

Note

If it is known that x has no deleted edges, seq_along(x$mel) is a faster way to generate the sequence of possible edge ids.

Author

skyebend

Examples


net<-network.initialize(100)
add.edges(net,1:99,2:100)
delete.edges(net,eid=5:95)
# get the ids of the non-deleted edges
valid.eids(net)
#> [1]  1  2  3  4 96 97 98 99