# is.connected.ppp

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Percentile

##### 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.

Keywords
spatial, math
##### 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.

##### 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.

is.connected, connected.ppp.

##### Aliases
• is.connected.ppp
##### Examples
# NOT RUN {
is.connected(redwoodfull, 0.1)
is.connected(redwoodfull, 0.2)
# }

Documentation reproduced from package spatstat, version 1.59-0, License: GPL (>= 2)

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