I suspect it is to do with your method of creating the dataframe, I would check to see if the columns in the df are numeric, which you can do by:
is.numeric(flat_data$time) for each variable, if it is not numeric (and at least one must be a character, given the error message) then redefine as a numeric flat_data$time<-as.numeric(flat_data$time) I reckon people better versed in R will have a more efficient solution, but that should work...... Ross -- View this message in context: http://r.789695.n4.nabble.com/ggplot-class-character-problem-tp3809657p3809786.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.
