Hi Amin, >> First, does R have a package that can implement the multimodality test, >> e.g., the Silverman test, DIP test, MAP test or Runt test.
Jeremy Tantrum (a Ph.D. student of Werner Steutzle's, c. 2003/04) did some work on this. There is some useful code on Steutzle's website: http://www.stat.washington.edu/wxs/Stat593-s03/Code/jeremy-unimodality.R I used it last year when I was trying to solve the problem of how best to compare lots of density curves (age distributions of 3 spp. of tree euphorbias from about very different 35 sites). In particular I had to ensure that I wasn't creating spurious bimodality at a particular age range when combining sites. You might find it useful. Feel free to contact me off list if the code has gone, as I think I still have it (somewhere). Regards, Mark. Amin W. Mugera wrote: > > > Dear Readers: > > I have two issues in nonparametric statistical analysis that i need > help: > > First, does R have a package that can implement the multimodality test, > e.g., the Silverman test, DIP test, MAP test or Runt test. I have seen > an earlier thread (sometime in 2003) where someone was trying to write > a code for the Silverman test of multimodality. Is there any other > tests that can enable me to know how many modes are in a distribution? > > Second, i would like to test whether two distributions are equal. Does R > have a package than can implement the Li (1996) test of the equality > of two distributions? Is there any other test i can use rather than the > Li test? > > Thank you in advance for your help. > > Amin Mugera > Graduate Student > AgEcon Dept. Kansas State University > > ______________________________________________ > 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. > > -- View this message in context: http://www.nabble.com/Modality-Test-tp19396085p19400095.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
