pcaMethods (version 1.64.0)

plotPcs: Plot many side by side scores XOR loadings plots

Description

A function that can be used to visualise many PCs plotted against each other

Usage

plotPcs(object, pcs = 1:nP(object), type = c("scores", "loadings"), sl = NULL, hotelling = 0.95, ...)

Arguments

object

pcaRes a pcaRes object

pcs

numeric which pcs to plot

type

character Either "scores" or "loadings" for scores or loadings plot respectively

sl

character Text labels to plot instead of a point, if NULL points are plotted instead of text

hotelling

numeric Significance level for the confidence ellipse. NULL means that no ellipse is drawn.

...

Further arguments to pairs on which this function is based.

Value

None, used for side effect.

Details

Uses pairs to provide side-by-side plots. Note that this function only plots scores or loadings but not both in the same plot.

See Also

prcomp, pca, princomp, slplot

Examples

data(iris)
pcIr <- pca(iris[,1:4], nPcs=3,  method="svd")
plotPcs(pcIr, col=as.integer(iris[,4]) + 1)