plot.skree is the function that takes an Optimal Classification object and
plots a Skree plot. Skree plots show the dimensionality of the voting by showing
the sizes of the eigenvalues.
#This data file is the same as that obtained using:#data(sen90)#sen90oc<-oc(sen90,dims=2,polarity=c(7,2))
data(sen90oc)
summary(sen90oc)
plot.OCskree(sen90oc)