[R] Wilcoxon Signed Rank Test

[Torsten Hothorn]

> Dear list,
>
> Please forgive me if this is a dumb question. I want to compare a set of
> paired data (pre and late). There are ties in pre and late. I searched
> on line, some document says use wilcox.exact in R instead of
> wilcox.test. Anyone has any experience using wilcoxon signed rank test
> to share?

R> library("exactRankTests")
R> x <- c(1.83,  0.50,  1.62,  2.48, 1.68, 1.88, 1.55, 3.06, 1.30)
R> y <- c(0.878, 0.647, 0.598, 2.05, 1.06, 1.29, 1.06, 3.14, 1.29)
R> wilcox.exact(x, y, paired = TRUE, alternative = "greater")

        Exact Wilcoxon signed rank test

data:  x and y
V = 40, p-value = 0.01953
alternative hypothesis: true mu is greater than 0

is one of the examples shown in ?wilcox.exact

Best,

Torsten


> Thanks in advance.
>
> platform i686-pc-linux-gnu
> arch     i686
> os       linux-gnu
> system   i686, linux-gnu
> status
> major    2
> minor    1.0
> year     2005
> month    04
> day      18
> language R
>
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