network (version 1.0-1)

network.edgecount: Return the Number of Edges in a Network Object

Description

network.edgecount returns the number of edges within a network, removing those flagged as missing if desired.

Usage

network.edgecount(x, na.omit = TRUE)

Arguments

x

an object of class network

na.omit

logical; omit edges with na==TRUE from the count?

Value

• The number of edges

Details

The return value network.edgecount is equal to x%n%"mnext"-1, minus the number of NULL edges (and missing edges, if na.omit==TRUE). Note that g%n%"mnext"-1 cannot, by itself, be counted upon to be an accurate count of the number of edges!

References

Butts, C.T. 2002. ``Memory Structures for Relational Data in R: Classes and Interfaces'' Working Paper.

See Also

get.network.attribute

Examples

#Create a network with three edges
m<-matrix(0,3,3)
m[1,2]<-1; m[2,3]<-1; m[3,1]<-1
g<-network(m)
network.edgecount(g)==3   #Verify the edgecount