Thanks Jim and Uwe!! Both methods work for me.
Methods: 1. plot as.character(x) 2. mtext(format(date,"%Y-%m-%d"),...) ______________________________________________ R-help@stat.math.ethz.ch 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.