connected.linnet
Connected Components of a Linear Network
Find the topologically-connected components of a linear network.
Usage
# S3 method for linnet
connected(X, …, what = c("labels", "components"))Arguments
- X
A linear network (object of class
"linnet").- …
Ignored.
- what
Character string specifying the kind of result.
Details
The function connected is generic. This is the method for
linear networks (objects of class "linnet").
Two vertices of the network are connected if they are joined by a path in the network. This function divides the network into subsets, such that all points in a subset are connected to each other.
If what="labels" the return value is a factor with one entry
for each vertex of X, identifying which connected component the
vertex belongs to.
If what="components" the return value is a list of linear
networks, which are the connected components of X.
Value
If what="labels", a factor.
If what="components", a list of linear networks.
See Also
Examples
# NOT RUN {
# remove some edges from a network to make it disconnected
plot(simplenet, col="grey", main="", lty=2)
A <- thinNetwork(simplenet, retainedges=-c(3,5))
plot(A, add=TRUE, lwd=2)
# find the connected components
connected(A)
cA <- connected(A, what="components")
plot(cA[[1]], add=TRUE, col="green", lwd=2)
plot(cA[[2]], add=TRUE, col="blue", lwd=2)
# }