pcaVar: Cumulative variance reduction

In jrevenaugh/TSAUMN: Time Series Analysis Tools Used in ESCI5201 at the University of Minnesota

Description

Compute and (optionally) plot cumulative variance reduction of PCs returned from prcomp

Usage

pcaVar(p, plot = TRUE, n = length(p$sdev))

Arguments

p	"prcomp" list from prcomp
plot	produce a ggplot2 plot
n	starting with PC #1, the number of PCs that should be included in results, defaults to all

Value

data.frame with PC index, the associated eigenvalue, variance (squared eigenvalue) and cumulative variance.

Examples

p <- prcomp(USArrests, scale = TRUE)
pcaVar( p )

jrevenaugh/TSAUMN documentation built on Nov. 8, 2019, 2:20 p.m.