Hi, Im using lme to calculate a mixed factors ANOVA according to: px_anova = anova(lme(dep~music*time*group, random = ~1|id, data = px_data))
where dep is a threshold, time is a repeated measures variable (2 levels) group is a between subjects variable (2 levels) id is a random factor (subject id) music is a between subjects variable (2 levels) indicating if a person has a musical experience, or not Musical experience is now decided by categorizing depending on the number of years practicing playing an instrument. I would like to use the years of playing an instrument as a covariate instead of creating categories. How can I do this in a simple way? Thanks and have a nice day! Kristoffer ______________________________________________ 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.
