[R] elegant solution to transform vector into percentages?
jholtman at gmail.com
Tue Jul 26 21:59:23 CEST 2005
> x.1 <- cut(store, breaks=c(-Inf,.8,1.2,Inf))
(-Inf,0.8] (0.8,1.2] (1.2,Inf]
25 25 50
On 7/26/05, jhainm at fas.harvard.edu <jhainm at fas.harvard.edu> wrote:
> I am looking for an elegant way to transform a vector into percentages of values
> that meet certain criteria.
> # now I want to get the precentages of values
> # that fall into the categories <=M , >M & <=N , >N
> # let
> M <-.8
> N <- 1.2
> # In my real example I have many more of these cutoff-points
> # What I did is:
> out <- matrix(NA,1,3)
> out[1,1] <- ( (sum(store<=M )) /length(store) )*100
> out[1,2] <- ( (sum(store> M & store<= N )) /length(store) )*100
> out[1,3] <- ( (sum(store> N )) /length(store) )*100
> colnames(out)<-c("percent<=M","percent>M & <=N","percent>N")
> But this gets very tedious if I have many cutoff-points. Does anybody know a
> more elegant way to do this task?
> Thanks so much.
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