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NEWS: Active development of ggbiplot has moved to the experimental branch

ggbiplot

An implementation of the biplot using ggplot2. The package provides two functions: ggscreeplot() and ggbiplot(). ggbiplot aims to be a drop-in replacement for the built-in R function biplot.princomp() with extended functionality for labeling groups, drawing a correlation circle, and adding Normal probability ellipsoids.

The development of this software was supported in part by NSF Postdoctoral Fellowship DMS-0903120

Installation

library(devtools)
install_github("vqv/ggbiplot")

Example Usage

library(ggbiplot)
data(wine)
wine.pca <- prcomp(wine, scale. = TRUE)
ggbiplot(wine.pca, obs.scale = 1, var.scale = 1,
  groups = wine.class, ellipse = TRUE, circle = TRUE) +
  scale_color_discrete(name = '') +
  theme(legend.direction = 'horizontal', legend.position = 'top')

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A biplot based on ggplot2

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