R help - Aug 2013 - How-to add to LDA ggplot axes the Percentage of variance explained

Hi,

How can I add  to LDA ggplot axes the Percentages of variance explained?

Script:
/require(MASS)
require(ggplot2)
iris.lda<-lda(Species ~ Sepal.Length + Sepal.Width + Petal.Length +
Petal.Width,  data = iris)
datPred<-data.frame(Species=predict(iris.lda)$class,predict(iris.lda)$x)

 
ggplot(datPred, aes(x=LD1, y=LD2, col=Species) ) + geom_point( size = 4,
aes(color = Species))
/  
Thanks 



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