[R] Kolmogorov smirnov test
m_olshansky at yahoo.com
Tue Oct 13 04:53:05 CEST 2009
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))))
--- On Tue, 13/10/09, Roslina Zakaria <zroslina at yahoo.com> wrote:
> From: Roslina Zakaria <zroslina at yahoo.com>
> Subject: [R] Kolmogorov smirnov test
> To: r-help at 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.
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