redwood: California Redwoods Point Pattern (Ripley's Subset)

Description

Locations of 62 seedlings and saplings of California redwood trees. The data represent the locations of 62 seedlings and saplings of California redwood trees in a square sampling region. They originate from Strauss (1975); the present data are a subset extracted by Ripley (1977) in a subregion that has been rescaled to a unit square.

The coordinates are rounded to the nearest 0.01 units, except for one point which has an $x$ coordinate of 0.999, presumably to ensure that it is properly inside the window. There are many further analyses of this dataset. It is often used as a canonical example of a clustered point pattern (see e.g. Diggle, 1983).

The original, full redwood dataset is supplied in the spatstat library as redwoodfull.

Usage

data(redwood)

Arguments

format

An object of class "ppp" representing the point pattern of tree locations. The window has been rescaled to the unit square.

See ppp.object for details of the format of a point pattern object.

source

Strauss (1975), subset extracted by Ripley (1977)

References

Diggle, P.J. (1983) Statistical analysis of spatial point patterns. Academic Press.

Ripley, B.D. (1977) Modelling spatial patterns (with discussion). Journal of the Royal Statistical Society, Series B 39, 172--212.