plotsom {chemometrics} | R Documentation |
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 |
grp |
numeric vector or factor with group information |
type |
type of presentation for output, see details |
margins |
plot margins for output, see |
... |
additional graphics parameters, see |
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 <P.Filzmoser@tuwien.ac.at>
References
K. Varmuza and P. Filzmoser: Introduction to Multivariate Statistical Analysis in Chemometrics. CRC Press, Boca Raton, FL, 2009.
See Also
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")
[Package chemometrics version 1.4.4 Index]