Cubic clustering criterion in R [closed]

Does anybody know if any package calculates the cubic clustering criterion (CCC) index in R to aid the selection of optimal number of clusters?

• Not exactly what you are looking for but the command cluster.stats from the R package fpc might be helpful. – user10525 May 24 '12 at 23:43
• @Procrastinator Please, make this an answer; this sounds like a good advice, according to the author of the fpc package on R-help. I also gave some pointers on related threads. – chl May 26 '12 at 10:29
• @chl Thanks for your comment. I have to admit that I do not know the area enough to make a defensible answer. I based my comment on the link you posted, the description on the manual and a quick search. – user10525 May 26 '12 at 10:33
• This question appears to be off-topic because it is about finding an R package. – gung - Reinstate Monica Jan 25 '14 at 21:09

It is included in NbClust and to be used via the option index = "ccc", e. g.
I_ccc <- NbClust(X, distance="euclidean", min.nc=2, max.nc=8, method = "complete",