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

Description

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

Usage

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Arguments

x

a network object, possibly with some deleted edges.

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.

Value

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

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(s)

skyebend

See Also

See also delete.edges

Examples

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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)

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