David, I agree with your sentiments. I also think that it is bad posting etiquette not to sign one's genuine name and affiliation when asking for help, which "blue sky" seems to do a lot. Bert Gunter has already raised this issue, and I completely agree with him. I would also like to urge the R-gurus to ignore such postings.
Best, Ravi. ____________________________________________________________________ Ravi Varadhan, Ph.D. Assistant Professor, Division of Geriatric Medicine and Gerontology School of Medicine Johns Hopkins University Ph. (410) 502-2619 email: rvarad...@jhmi.edu ----- Original Message ----- From: David Winsemius <dwinsem...@comcast.net> Date: Friday, March 5, 2010 9:25 am Subject: Re: [R] Nonparametric generalization of ANOVA To: blue sky <bluesky...@gmail.com> Cc: r-h...@stat.math.ethz.ch > On Mar 5, 2010, at 8:19 AM, blue sky wrote: > > > My interpretation of the relation between 1-way ANOVA and Wilcoxon's > > test (wilcox.test() in R) is the following. > > > > 1-way ANOVA is to test if two or multiple distributions are the same, > > assuming all the distributions are normal and have equal variances. > > Wilcoxon's test is to test two distributions are the same without > > assuming what their distributions are. > > > > In this sense, I'm wondering what is the generalization of Wilcoxon's > > test to more than two distributions. And, more general, what is the > > generalization of Wilcoxon's test to multi-way ANOVA with arbitrary > > complex model formula? What are the equivalent F statistics and t > > statistics in the generalization of Wilcoxon's test? > > > > Note that I'm not interested in looking for a specific nonparametric > > test for a particular dataset right now, although this is important > in > > practice. What I'm interested the general nonparametric statistical > > framework that parallels ANOVA. Could somebody give some hints on what > > references I should look for? I have google searched this topic, but > > don't find a page that exactly answered my question. > > This is your first of three postings in the last hour and they are > all > in a category that could well be described as requests for tutoring > in > basic statistical topics. I am of the impression you have been > requested not to engage in such behavior on this list. For this > question for instance there is an entire CRAN Task View available and > > you have been in particular asked to sue such resource before posting. > > It's not the described role of the r-help list to remediate your lack > > of statistical background, but rather to deal with difficulties in > applying the R-language to particular, discrete and exemplified > problems. > > -- > > David Winsemius, MD > West Hartford, CT > > ______________________________________________ > R-help@r-project.org mailing list > > PLEASE do read the posting guide > 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.
