Heuristic Determination of Matrix Types for Network Storage
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.
a matrix, or an object of class
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.
David Hunter email@example.com
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/
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#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"))
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