trackeR (version 0.0.3)

funPCA: Functional principal components analysis of distribution or concentration profiles.

Description

Functional principal components analysis of distribution or concentration profiles.

Generic function for functional principal components analysis.

Usage

"funPCA"(object, what, nharm = 4, ...)
"funPCA"(object, what, nharm = 4, ...)
funPCA(object, ...)

Arguments

object

The object to which a functional principal components analysis is applied.

what

The variable for which the profiles should be analysed.

nharm

The number of principal components estimated.

...

Arguments to be passed to methods.

Value

An object of class trackeRfpca.

Details

The ... argument is passed on to pca.fd.

References

Ramsay JO, Silverman BW (2005). Functional Data Analysis. Springer-Verlag New York.

Examples

data("runs", package = "trackeR")
dp <- distributionProfile(runs, what = "speed")
dp.pca <- funPCA(dp, what = "speed", nharm = 4)
## 1st harmonic  captures vast majority of the variation
plot(dp.pca, harm = 1)
## time spent above speed = 0 is the characteristic distinguishing the profiles
sumRuns <- summary(runs)
plot(sumRuns$durationMoving, dp.pca$scores[,1])