expandMap {kohonen}

Expand a self-organising map

Description

Double the size of a map, imputing the codebookvectors of the new units by averiging their immediate neighbours.

Usage

expandMap(kohobj)

Arguments

kohobj

Object of class "kohonen")

Value

A new kohonen object, with a double size.

Author(s)

Ron Wehrens

Examples

data(yeast)
yeast.supersom <- supersom(yeast, somgrid(4, 4, "hexagonal"),
                           whatmap = 3:6, maxNA.fraction = .5)
yeast.supersom2 <- expandMap(yeast.supersom)
yeast.supersom3 <- supersom(yeast, yeast.supersom2$grid,
                            whatmap = 3:6, maxNA.fraction = .5,
                            init = yeast.supersom2$codes[3:6])