plotld: Plot principal component loadings

In plotpc: Plot Principal Component Histograms Around a Scatter Plot

Description

Plot principal component loadings.

Usage

plotld(x, npc=3, main="Loadings", lty=1, lwd=4 / 1:npc,
    col=gray(0:(npc-1) / npc), ylim=range(loadings), abs.=FALSE,
    cex=.8, ylab=if(abs.) "abs(loading)" else "loading",
    legend.x=NULL, legend.y=NULL)

Arguments

x	A matrix or dataframe, passed directly to princomp.
npc	Number of principal components to plot. Default 3.
main	Plot title. Default "Loadings".
lty	Line type for for plotted lines. Default 1.
lwd	Line width of plotted lines. The default is ugly but effective: 4 / 1:npc.
col	Color of plotted lines. Default is a range of grays: gray(0:(npc-1) / npc).
ylim	Vertical limits of the graph. Default range(loadings).
abs.	Use absolute values of loadings. Default FALSE.
cex	Character expansion for axis and legend text. Default .8.
ylab	Default "loading".
legend.x, legend.y	Position of the legend. Default NULL, meaning automatic. For no legend, use an out-of-range legend.x or legend.y.

See Also

princomp, plotpc

Examples

data(iris)
x <- iris[, -5] # -5 to drop Species
plotld(x)

plotpc documentation built on May 1, 2019, 6:33 p.m.