Hi Roslina, I believe that you can ignore the warning. Alternatively, you may add a very small random noise to pairs with ties, i.e. something like xobs[which(duplicated(xobs))] <- xobs[which(duplicated(xobs))] + 1.0e-6*sd(xobs)*rnorm(length(which(duplicated(xobs))))
Regards, Moshe. --- On Tue, 13/10/09, Roslina Zakaria <zrosl...@yahoo.com> wrote: > From: Roslina Zakaria <zrosl...@yahoo.com> > Subject: [R] Kolmogorov smirnov test > To: r-help@r-project.org > Received: Tuesday, 13 October, 2009, 9:58 AM > > Hi r-users, > > I would like to use Kolmogorov smirnov test but in my > observed data(xobs) there are ties. I got the warning > message. My question is can I do something about it? > > ks.test(xobs, xsyn) > > Two-sample Kolmogorov-Smirnov test > data: xobs and xsyn > D = 0.0502, p-value = 0.924 > alternative hypothesis: two-sided > > Warning message: > In ks.test(xobs, xsyn) : cannot compute correct p-values > with ties > > Thank you for all your help. > > > > > [[alternative HTML version deleted]] > > > -----Inline Attachment Follows----- > > ______________________________________________ > 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. > ______________________________________________ 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.