swedishpines {spatstat.data}

Swedish Pines Point Pattern

Description

The data give the locations of pine saplings in a Swedish forest.

Usage

data(swedishpines)

Format

An object of class "ppp" representing the point pattern of tree locations in a rectangular plot 9.6 by 10 metres.

Cartesian coordinates are given in decimetres (multiples of 0.1 metre) rounded to the nearest decimetre. Type rescale(swedishpines) to get an equivalent dataset where the coordinates are expressed in metres.

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

Note

For previous analyses see Ripley (1981, pp. 172-175), Venables and Ripley (1997, p. 483), Baddeley and Turner (2000).

Source

Strand (1972), Ripley (1981)

References

Baddeley, A. and Turner, R. (2000) Practical maximum pseudolikelihood for spatial point patterns. Australian and New Zealand Journal of Statistics 42, 283–322.

Ripley, B.D. (1981) Spatial statistics. John Wiley and Sons.

Strand, L. (1972). A model for stand growth. IUFRO Third Conference Advisory Group of Forest Statisticians, INRA, Institut National de la Recherche Agronomique, Paris. Pages 207–216.

Venables, W.N. and Ripley, B.D. (1997) Modern applied statistics with S-PLUS. Second edition. Springer Verlag.

Examples

  if(require(spatstat.geom)) {
     swedishpines

     ## rescale to metres
     rescale(swedishpines)
  }