Hi,
I am using the lda function from the MASS library. I would to find the
decision boundaries of each class and subsequently plot them. I wonder if
anybody can offer any help on this topic?
Below I applied the lda function on a small dataset of mine.
Any help will be much appreciated.
> library(MASS)
> AA<-read.table("http://www.natursyn.dk/online/fingerprinting.txt",header=T)
> aa.lda<-lda(as.matrix[3:9],AA$group)
> aa.ld<-predict(aa.lda,dimen=2)$x
> eqscplot(aa.ld,type="n",xlab="LD1", ylab="LD2",las=1)
> text(aa.ld,c(rep('f',13),rep('b',10),rep('p',10)))
> aa.mean<-lda(aa.ld,AA$group)$means
> points(aa.mean,pch=3)
Best,
Thomas Larsen
Leibniz-Laboratory for Stable Isotope Research
Max-Eyth-Str. 11-13, 24118 Kiel, Germany
Work: +49-431-880-3896
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