biplot.som: Biplot of a som object

In harrysouthworth/kohonen: Self-organizing Maps for Data Classification

Description

Produces a biplot corresponding to the som object and its data.

Usage

biplot.som(object, type = "lines", cex = 0.75)

Arguments

object	a som object
type	character specifying the type of biplot : [lines | bar | boxplot | solid]
cex	character expansion of titles and legend.

Details

type = 'lines' : for each class, plot values and the associated prototype, type = 'solid' : for each class, plot the prototype as a solid polygon. type = 'stars' : for each class, plot the prototype as a star. type = 'boxplot' : plot a boxplot of the sums of squares (ss of the data in the class).

Note

When type = 'lines', the plotting procedure is slow.

Author(s)

David Gohel

See Also

som learn plot.som

Examples

library(MASS)
lcrabs <- log(crabs[, 4:8])

lcrabs.som <- som ( formula = ~ . , data = lcrabs
	, neighborhood = "uniform"
	, grid = grid ( xdim = 10 , ydim = 10 , type = "hexagonal" ) 
	, weights.min = min (lcrabs), weights.max = max (lcrabs)
	)
lcrabs.som <- learn( lcrabs.som , number.iter = 500 , max.alpha = 0.5, min.alpha = .001, max.rayon = 3 , step.eval.si = 50)

#--- profil for each class ---#
biplot( lcrabs.som , type = "stars")
biplot( lcrabs.som , type = "lines")
biplot( lcrabs.som , type = "solid")
biplot( lcrabs.som , type = "boxplot")

harrysouthworth/kohonen documentation built on May 17, 2019, 3:03 p.m.