provenance (version 0.2)

getPCA: Principal Component Analysis

Description

Performs PCA of compositional data using a centred logratio distance

Usage

getPCA(x, ...)

Arguments

x

an object of class HMdata

...

optional arguments to R's princomp function

Value

• an object of class PCA

Examples

fname <- system.file("Major.csv",package="provenance")
Major <- read.HMdata(fname)
plot(getMDS(Major,classical=TRUE))
dev.new()
plot(getPCA(Major),asp=1)
print("This example demonstrates the equivalence of classical MDS and PCA")