japanesepines {spatstat.data}

Japanese Pines Point Pattern

Description

The data give the locations of saplings of Japanese black pine (Pinus thunbergii) in a square sampling region in a natural forest. The observations were originally collected by Numata (1961).

These data are used as a standard example in the textbook of Diggle (2003); see pages 1, 14, 19, 22, 24, 56–57 and 61.

Usage

data(japanesepines)

Format

An object of class "ppp" representing the point pattern of 65 tree sapling locations in a 5.7 x 5.7 metre square, rescaled to the unit square and rounded to two decimal places.

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

Source

Diggle (2003), obtained from Numata (1961)

References

Diggle, P.J. (2003) Statistical Analysis of Spatial Point Patterns. Arnold Publishers.

Numata, M. (1961) Forest vegetation in the vicinity of Choshi. Coastal flora and vegetation at Choshi, Chiba Prefecture. IV. Bulletin of Choshi Marine Laboratory, Chiba University 3, 28–48 (in Japanese).

Examples

  if(require(spatstat.geom)) {
   japanesepines
   summary(japanesepines)
   ## rescale to metres
   (Jpines <- rescale(japanesepines))
  }