spatstat (version 1.57-1)

is.connected.ppp: Determine Whether a Point Pattern is Connected

Description

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 R units apart will be joined together.

Ignored.

Value

A logical value.

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.

See Also

is.connected, connected.ppp.

Examples

Run this code
# NOT RUN {
  is.connected(redwoodfull, 0.1)
  is.connected(redwoodfull, 0.2)
# }

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