[EMAIL PROTECTED] writes: > Full_Name: t. avery > Version: 2.0.0 > OS: windows xp / Linux > Submission from: (NULL) (131.162.134.159) > > > ks.test does not produce the correct output. > If given the script: > > d1 <- > c(53.63984674,0.383141762,1.915708812,0.383141762,10.72796935,6.896551724,20.30651341,5.747126437,0) > d1 > > d2 <- > c(76.43312102,15.2866242,3.821656051,1.27388535,0,0.636942675,1.27388535,0.636942675,0.636942675) > d2 > > ks.test(d1,d2,alternative="two.sided",exact) > > The output generates: > Two-sample Kolmogorov-Smirnov test > > data: dd and ddd > D = 0.3333, p-value = 0.6994 > alternative hypothesis: two.sided > > Warning message: > cannot compute correct p-values with ties in: ks.test(dd, ddd, alternative = > "two.sided", exact) > > Which is far from the correct D value of: > > D = 0.404934475 with a p-value < 0.01
According to what definition? Referring to what distribution? Reference? Considering that D is the distance between two CDFs, both of which take values in (0:9)/9, I do find it a bit unconvincing that you claim that D should be something that is not a whole number of ninths... > I recommend that noone use this test. I have tested it with various datasets > from publications and texts using by-hand calculations. Well, I'm no fan of the KS test either, but you have to work harder to convince us that there's a problem in R's implementation! -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
