> If it's regular, but incomplete, that method will work. If it's > irregular, then no image method will work without first interpolating > a regular grid.
Thanks Hadley. As I suspected, but ggplot2 is so very clever that I thought it was worth asking :) Michael ______________________________________________ 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.
