Please provide a minimal sufficient coding example and try to formulate your question a bit more specific. With the dataset you gave, the answer is A-1 B-0 C-0
If you want to do cluster analysis, check the functions in the package cluster. for finding the optimal number of clusters in a dataset, all tools are available there. Also take a look at the functions hclust and kmeans and the related plots. On Thu, May 6, 2010 at 7:39 PM, sumit gupta <sumit.i...@gmail.com> wrote: > Hi, > > Can anyone tell me how to find number of cluster for a data set. > > I have a data set in following format > > > Group var1 var2 var3 > A 1 2 3 > A 1 2 3 > A 1 2 3 > B....... > B....... > C > C.... > C > C..... > > > I want to know for each group what is the optimum number of cluster. > like A- 2 > B-3 > C-5 > > please could anyone help.its very urgent. > > Thanks > > Sumit > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Joris Meys Statistical Consultant Ghent University Faculty of Bioscience Engineering Department of Applied mathematics, biometrics and process control Coupure Links 653 B-9000 Gent tel : +32 9 264 59 87 joris.m...@ugent.be ------------------------------- Disclaimer : http://helpdesk.ugent.be/e-maildisclaimer.php [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
