[R] How to apply the Wilcoxon test to a hole table at once?
Iurie Malai
iurie.malai at gmail.com
Fri Oct 23 21:34:59 CEST 2009
Hi,
I have a data set:
> Dataset
X1 X2 X3 X4 X5 X6 X7 X8 X9 X10 X11 X12 X13 X14 X15 X16 X17
1 user1 m 22 19 28 24 12 18 9 7 4 5 4 7 5 7 9
2 user2 f 25 19 23 18 18 15 6 8 6 6 7 10 7 7 7
3 user3 f 28 21 24 18 15 12 10 6 7 9 5 10 5 9 5
4 user4 f 26 19 26 21 12 18 6 6 5 1 3 8 6 5 6
5 user5 m 21 22 26 18 9 6 4 6 1 7 2 4 4 6 4
6 user6 m 24 8 25 12 18 12 7 8 4 1 4 6 7 5 6
...............................................................
71 user71 m 18 4 10 6 3 6 9 5 10 8 4 5 6 5 5
I can apply the Wilcoxon test on each column one by one, but how to do this
on the hole table at once?
> wilcox.test(X3 ~ X2, alternative="two.sided", data=Dataset)
Wilcoxon rank sum test with continuity correction
data: X3 by X2
W = 439, p-value = 0.1291
alternative hypothesis: true location shift is not equal to 0
>
I researched on this, but I can't find a solution.
I would really appreciate any help.
P.S. Excuse my lack of terminology :).
Iurie Malai
Moldova Pedagogical State University
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