Converts the edges of the infection tree described in the
transmat
object into a network
object,
copying in appropriate edge attributes for 'at', 'infDur', 'transProb',
'actRate', and 'finalProb' and constructing a vertex attribute
for 'at'.
# S3 method for transmat
as.network(x, ...)
an object of class transmat
to be converted into a network
object
unused