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2009 Nov 18
1
mann-whitney test with more groups
...nificantly from group2. This is a question to be answered by mann-whitney-u-test. I know that I can use wilcox.test with 2 samples. My problem: How can r perform the test automatically if there are more than 2 groups in my data frame. Test group1 vs. 2, 1 vs. 3, 1 vs. 4, etc. This is my skript: Deckung <- read.table("Gesamtdeckung.csv", sep=";", header=TRUE, dec=",", row.names=1) x <- Deckung$Gesamtdeckung y <- Deckung$Klasse #U-Test wilcox.test(x ~ y, paired = FALSE, subset = y %in% c("1", "2")) wilcox.test(x ~ y, paired = FALSE, subse...