AdjacencyFromEdgelist: Convert an edgelist to an adjacency matrix
Description
Given the adjacency matrix for a network return a
data.frame listing all possible edges and the weights for
each edge.
Usage
AdjacencyFromEdgelist(elist, check.full = TRUE)
Arguments
elist
data.frame, see 'Details' for formatting
assumptions.
check.full
logical, if TRUE ensures that all
possible edges are in the list exactly once; if FALSE it
assumes this is true.
Value
list, containing an adjacency matrix and a vector of node
ids identifying the rows and columns.
adjacency
The adjacency matrix for the
network. The row indicates the node the edge is coming
'from', the column indicates the node the edge is going
'to', and the value in the adjacency matrix is the weight
given to the edge.
nodelist
The ids of the
nodes in the same order as the the rows and columns of
the adjacency matrix.
Details
This assumes that elist is a data.frame with three
columns. Each row is an edge in the network. The first
column lists the node the edge is coming from, the second
column lists the node the edge is going to, and the third
column lists the weight of the edge.