Hello everybody, I use the sweetpotato database included in R package:
data(sweetpotato) This dataset contains two variables: yield(continous variable) and virus(factor variable). Due to Levene test is significant I cannot assume homogeneity of variances and I apply Welch test in R instead of one-way ANOVA followed by Tukey posthoc. Nevertheless, the problems come from when I apply posthoc test. In Tukey posthoc test I use library(agricolae) and displays me the superscript letters between virus groups. Therefore there are no problems. Nevertheless, to perform Games-Howell posthoc, I use library(userfriendlyscience) and I obtain Games-Howell output but it's impossible for me to obtain a letter superscript comparison between virus groups as it is obtained through library(agricolae). The code used it was the following: library(userfriendlyscience) data(sweetpotato) oneway<-oneway(sweetpotato$virus, y=sweetpotato$yield, posthoc = 'games-howell') oneway I try with cld() importing previously library(multcompView) but doesn't work. Can somebody could helps me? Thanks in advance, David Bars. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
