# 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?

## closed as off-topic by gung♦, Scortchi♦, Peter Flom♦Jan 26 '14 at 10:13

• This question does not appear to be about statistics within the scope defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

• 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 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",