Hello I have a huge data frame with three columns 'Roof' 'Month' and 'Temp' i want to run analyses on the numerical Temp data by the factors Roof and Month, separately and together. For using more than one factor i understand i should use aggregate, but i am struggling with the tapply for single factor analysis.
> tapply(Temp, INDEX = Roof, FUN = median) This works fine, however if i try to do anything a bit more complex, such as: > tapply(Temp, INDEX = Roof, FUN = kruskal.test) it gives the error - Error in length(g) : 'g' is missing What could be the problem? Thanks -- View this message in context: http://r.789695.n4.nabble.com/tapply-confusion-tp4641729.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list 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.
