Hi list-members can anybody tell me why
> pairwise.t.test(val, fac) produces an empty p-table. As shown below: Pairwise comparisons using t tests with pooled SD data: val and fac AS AT Fhh Fm Fmk Fmu GBS Gf HFS Hn jAL Kol R_Fill AT - - - - - - - - - - - - - Fhh - - - - - - - - - - - - - Fm - - - - - - - - - - - - - Fmk - - - - - - - - - - - - - Fmu - - - - - - - - - - - - - GBS - - - - - - - - - - - - - Gf - - - - - - - - - - - - - HFS - - - - - - - - - - - - - Hn - - - - - - - - - - - - - jAL - - - - - - - - - - - - - Kol - - - - - - - - - - - - - R_Fill - - - - - - - - - - - - - Sa - - - - - - - - - - - - - However val and fac do have the same length and are not empty: > summary(fac) AS AT Fhh Fm Fmk Fmu GBS Gf HFS Hn jAL Kol R_Fill Sa 50 14 7 35 14 25 59 51 90 65 12 26 96 26 > summary(val) Min. 1st Qu. Median Mean 3rd Qu. Max. NA's 0.0000 0.1744 0.6395 2.1540 1.7440 40.1200 223.0000 Thanks in advamce Thomas H. ______________________________________________ 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