Wombling {wombsoft}R Documentation

Matrices of the systemic function and the direction of the gradient.

Description

These functions compute the wombling method (i.e. systemic function). The resulting matrix of the systemic function is written in the file systemic.txt, and the directions of the gradient in direction.txt. It also produces a coloured map showing the intensity of the gradient and its main direction.

Usage

WomblingDominant(data,h,output_syst="syst.txt",output_dir="dir.txt")
WomblingCodominant(data,h,output_syst="syst.txt",output_dir="dir.txt")
WomblingContingency(data,h,output_syst="syst.txt",output_dir="dir.txt")

Arguments

data the list of the six items provided by the Data and the Mirror functions.
h bandwidth : corresponding to the scale we perform the analysis on.
output_syst, output_dir file names of the two matrices. Default values are "syst.txt" and "dir.txt" in the current directory.

Details

at each grid point, the weight assigned to an individual is exp(-di^2/(2h^2)) where di is the distance from the grid point to the individual, and h the bandwidth given by the user.

Value

none

See Also

Data for the format of the data variable.


[Package wombsoft version 2.0 Index]