Knut Krueger <[EMAIL PROTECTED]> writes: > does anybody know why there are the two warnings in the example above? > > Regards Knut > > > day_4 > [1] 540 1 1 1 1 1 1 300 720 480 > > day_1 > [1] 438 343 1 475 1 562 500 435 1045 890 > > > is.vector (day_1) > [1] TRUE > > is.vector (day_4) > > [1] TRUE
The paired Wilcoxon test depends on pairwise differences and as far as I can see you have two of those being zero, in cases 3 and 5. > > wilcox.test(day_4 > ,day_1,paired=TRUE,alternative="two.sided",exact=TRUE,conf.int=TRUE) > > Wilcoxon signed rank test with continuity correction > > data: day_4 and day_1 > V = 1, p-value = 0.02086 > alternative hypothesis: true mu is not equal to 0 > 95 percent confidence interval: > -486.5 -120.0 > sample estimates: > (pseudo)median > -348 > > Warning messages: > 1: cannot compute exact p-value with zeroes in: > wilcox.test.default(day_4, day_1, paired = TRUE, alternative = > "two.sided", > 2: cannot compute exact confidence interval with zeroes in: > wilcox.test.default(day_4, day_1, paired = TRUE, alternative = > "two.sided", > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > -- O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
