pca.legend {affycoretools}R Documentation

A Function to Automagically Place a Legend in a PCA Plot

Description

This function places a legend in a PCA plot depending on which corner is available. If there are no available corners, user intervention will be required. This is an internal function and not intended to be called by the end user.

Usage

pca.legend(pca, groupnames, pch, col, x.coord = NULL, y.coord = NULL,
saveup = FALSE)

Arguments

pca A 'pca' object
groupnames A vector of names describing the different groups
pch A numeric vector delineating the plotting symbols to use
col A numeric or character vector delineating the colors to use for the plotting symbols
x.coord X-coordinate for legend. Used if automatic placement will fail
y.coord Y-coordinate for legend. Used if automatic placement will fail
saveup Boolean: Save a small value for plotting additional text?

Value

This function returns nothing. It is used only for the side effect of placing a legend in a plot.

Author(s)

James W. MacDonald <jmacdon@med.umich.edu>


[Package affycoretools version 1.8.1 Index]