Can anyone suggest a good non-parametric test, and an R implementation of the
test, that allows for two or more factors? Wilcoxon signed rank allows for
only one.
Thanks,
John
John Sorkin M.D., Ph.D.
Chief, Biostatistics and Informatics
Baltimore VA Medical Center GRECC and
University of
?kruskal.test
2005/10/11, John Sorkin [EMAIL PROTECTED]:
Can anyone suggest a good non-parametric test, and an R implementation of the
test, that allows for two or more factors? Wilcoxon signed rank allows for
only one.
Thanks,
John
John Sorkin M.D., Ph.D.
Chief, Biostatistics and
I suspect that John may be looking for ?friedman.test, which I believe
will allow for a two-way non-parametric test.
kruskal.test() will perform a non-parametric test on two or more samples
(or factor levels) as a generalization of wilcox.test() for one or two
samples (or factor levels).
HTH,
Marc Schwartz (via MN) [EMAIL PROTECTED] writes:
I suspect that John may be looking for ?friedman.test, which I believe
will allow for a two-way non-parametric test.
You could be right, but you could also be wrong... It depends quite a
bit on what is meant by a two-factor comparison of means.
Peter,
Good points all around.
Hopefully John will provide further clarification.
Best regards,
Marc
On Tue, 2005-10-11 at 19:46 +0200, Peter Dalgaard wrote:
Marc Schwartz (via MN) [EMAIL PROTECTED] writes:
I suspect that John may be looking for ?friedman.test, which I believe
will
