is.connected.ppp
Determine Whether a Point Pattern is Connected
Determine whether a point pattern is topologically connected when all pairs of points closer than a threshold distance are joined.
Usage
# S3 method for ppp
is.connected(X, R, …)Arguments
- X
A point pattern (object of class
"ppp").- R
Threshold distance. Pairs of points closer than
Runits apart will be joined together.- …
Ignored.
Details
The function is.connected is generic. This is the method for
point patterns (objects of class "ppp").
The point pattern X is first converted into an abstract graph
by joining every pair of points that lie closer than R units
apart. Then the algorithm determines whether this graph is connected.
That is, the result of is.connected(X) is TRUE
if any point in X can be reached from any other point,
by a series of steps between points of X,
each step being shorter than R units in length.
Value
A logical value.
See Also
Examples
# NOT RUN {
is.connected(redwoodfull, 0.1)
is.connected(redwoodfull, 0.2)
# }