R: Heuristic Determination of Matrix Types for Network Storage
which.matrix.type
R Documentation
Heuristic Determination of Matrix Types for Network Storage
Description
which.matrix.type attempts to choose an appropriate matrix expression for a network object, or (if its argument is a matrix) attempts to determine whether the matrix is of type adjacency, incidence, or edgelist.
Usage
which.matrix.type(x)
Arguments
x
a matrix, or an object of class network
Details
The heuristics used to determine matrix types are fairly arbitrary, and should be avoided where possible. This function is intended to provide a modestly intelligent fallback option when explicit identification by the user is not possible.
Butts, C. T. (2008). “network: a Package for Managing Relational Data in R.” Journal of Statistical Software, 24(2). http://www.jstatsoft.org/v24/i02/
See Also
as.matrix.network, as.network.matrix
Examples
#Create an arbitrary adjacency matrix
m<-matrix(rbinom(25,1,0.5),5,5)
diag(m)<-0
#Can we guess the type?
which.matrix.type(m)
#Try the same thing with a network
g<-network(m)
which.matrix.type(g)
which.matrix.type(as.matrix.network(g,matrix.type="incidence"))
which.matrix.type(as.matrix.network(g,matrix.type="edgelist"))