coloredbiplot: A biplot providing somewhat easier access to details of the...

In compositions: Compositional Data Analysis

A biplot providing somewhat easier access to details of the plot.

Description

This function generates a simple biplot out of various sources and allows to give color and symbol to the x-objects individually.

Usage

## Default S3 method:
coloredBiplot(x, y, var.axes = TRUE, col, 
         cex = rep(par("cex"), 2), xlabs = NULL, ylabs = NULL, expand=1, 
         xlim = NULL, ylim = NULL, arrow.len = 0.1, main = NULL, sub = NULL, 
         xlab = NULL, ylab = NULL, xlabs.col = NULL, xlabs.bg = NULL, 
         xlabs.pc=NULL, ...)
## S3 method for class 'princomp'
coloredBiplot(x, choices = 1:2, scale = 1, 
         pc.biplot=FALSE, ...)
## S3 method for class 'prcomp'
coloredBiplot(x, choices = 1:2, scale = 1, 
         pc.biplot=FALSE, ...)
         

Arguments

x	a representation of the the co-information to be plotted, given by a result of princomp or prcomp; or the first set of coordinates to be plotted
y	optional, the second set of coordinates to be potted
var.axes	if 'TRUE' the second set of points have arrows representing them as (unscaled) axes
col	one color (to be used for the y set) or a vector of two colors (to be used for x and y sets respectively, if xlabs.col is NULL)
cex	the usual cex parameter for plotting; can be a length-2 vector to format differently x and y labels/symbols
xlabs	names to write for the points of the first set
ylabs	names to write for the points of the second set
expand	expansion factor to apply when plotting the second set of points relative to the first. This can be used to tweak the scaling of the two sets to a physically comparable scale
xlim	horizontal axis limits
ylim	vertical axis limits
arrow.len	length of the arrow heads on the axes plotted if 'var.axes' is true. The arrow head can be suppressed by 'arrow.len=0'
main	main title
sub	subtitle
xlab	horizontal axis title
ylab	vertical axis title
xlabs.col	the color(s) to draw the points of the first set, if xlabs is null
xlabs.bg	the filling color(s) to draw the points of the first set, if xlabs is null and xlabs.pc is between 21 and 25.
xlabs.pc	the plotting character(s) for the first set, if xlabs is null
scale	the way to distribute the singular values on the right or left singular vectors for princomp and prcomp objects (see biplot)
choices	the components to be plotted (see biplot)
pc.biplot	should be scaled by sqrt(nrow(X))? (see biplot)
...	further parameters for plot

Details

The functions is provided for convenience.

Value

The function is called only for the side effect of plotting. It is a modification of the standard R routine 'biplot'.

Author(s)

Raimon Tolosana-Delgado, K.Gerald v.d. Boogaart http://www.stat.boogaart.de

See Also

biplot, plot.acomp

Examples

data(SimulatedAmounts)
coloredBiplot(x=princomp(acomp(sa.outliers5)),pc.biplot=FALSE,
          xlabs.pc=c(1,2,3), xlabs.col=2:4, col="black")

compositions documentation built on June 22, 2024, 12:15 p.m.