Hello Marcos, When you use paste(.), it will return a String, and the first argument of lda(.) does not read a string as formula.
>lda(Grupo~paste(names(cien[,3:80]),collapse="+"),data=cien) Here's what I'd do: colIndex <- c(1,2,4,5,...) #what ever index of your input data set that you want to use as variables #I presume Grupo is the class column (col=3)? lda(cien[,colIndex], cien[,3]) Hope this helps.. Wai-Kuan Yip http://www.deakin.edu.au/~waiyip http://www.deakin.edu.au/~waiyip -- View this message in context: http://n4.nabble.com/multiple-column-argument-in-formula-MASS-lda-tp931285p931814.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.
