Dear JM,
creating a data frame did indeed solve my problem. Thank you so much. Best wishes Bernd Von: zelfortin [mailto:jmichel.for...@gmail.com] Gesendet: Freitag, 2. August 2013 22:10 An: r-help-arch...@googlegroups.com Cc: r-help@r-project.org; Puschner, Bernd Betreff: Re: [R] lme: object is not a matrix Hi, make sure your data is in a data frame: Data <- data.frame(t,can2p,code) just specify in which object you find those specific variables by using object$ before each one. I hope this solve the problem. If not, post your script, it's really hard to work with only an error message! Cheers JM [[alternative HTML version deleted]] ______________________________________________ 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.