plotsom: Plot SOM results

In chemometrics: Multivariate Statistical Analysis in Chemometrics

Plot SOM results

Description

Plot results of Self Organizing Maps (SOM).

Usage

plotsom(obj, grp, type = c("num", "bar"), margins = c(3,2,2,2), ...)

Arguments

obj	result object from som
grp	numeric vector or factor with group information
type	type of presentation for output, see details
margins	plot margins for output, see par
...	additional graphics parameters, see par

Details

The results of Self Organizing Maps (SOM) are plotted either in a table with numbers (type="num") or with barplots (type="bar"). There is a limitation to at most 9 groups. A summary table is returned.

Value

sumtab

Summary table

Author(s)

Peter Filzmoser <[e-mail]>

References

K. Varmuza and P. Filzmoser: Introduction to Multivariate Statistical Analysis in Chemometrics. CRC Press, Boca Raton, FL, 2009.

See Also

som

Examples

data(glass)
require(som)
Xs <- scale(glass)
Xn <- Xs/sqrt(apply(Xs^2,1,sum))
X_SOM <- som(Xn,xdim=4,ydim=4) # 4x4 fields
data(glass.grp)
res <- plotsom(X_SOM,glass.grp,type="bar")

chemometrics documentation built on Aug. 25, 2023, 5:18 p.m.