WomblingRk {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) with a moving bandwidth : the windows contain always the same number of individuals : k. 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 directions.

Usage

WomblingDominantRk(data,ranks,k,output_syst="syst.txt",output_dir="dir.txt")
WomblingCodominantRk(data,ranks,k,output_syst="syst.txt",output_dir="dir.txt")

Arguments

data the list of the six items provided by the Data and the Mirror functions.
ranks the vector of the ranks of distances of individuals to the grid points, result of the function Ranks.
k number of individuals in each window.
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(-Ri/k) where Ri is the rank of the individual regarding the distances of individuals to the considered grid point, and k the number of individuals given by the user.

Value

none

See Also

Data and Ranks for the format of the data and the ranks variables.


[Package wombsoft version 2.0 Index]