cwhmisc (version 2.1)

p.screeplot.princomp: Plot screeplot

Description

p.screeplot.princomp plots a screeplot with labels of cumulative variances

Arguments

object

an object of class "princomp" created by princomp

variables

a vector of integers selecting the elements of $object$sdev^2$.

cumulative

a logical value. If FALSE, the labels on bars show variances. If TRUE, they show cumulative variances.

main

overall title for the plot.

ylim

limits for the y axis.

...

optional arguments for barplot

Value

• A numeric vector (or matrix, when beside = TRUE), say mp, giving the coordinates of all the bar midpoints drawn, useful for adding to the graph.

synopsis

p.screeplot.princomp(object, variables=seq(length(object$sdev)), cumulative=TRUE, main=deparse(substitute(object)), ylim=c(0,max(vars)+0.05),...)

Examples

library(stats)
  m <- cbind(rnorm(100),rlnorm(100))
  p.screeplot.princomp(princomp(m))
p.screeplot.princomp(princomp(m),main="Screeplot",ylab="Variances",cex=0.6)