> You should only have one scale_ call for each scale type. Here, you have > three scale_colour_ calls, the first selecting a grey scale, the second > defining a single break with its label (and thus implicitly subsetting on > that single break value), and a second which defines a different > break/label/subset. Only the last one has any effect.
Just to clarify: breaks/labels control the appearance of the legend/axis, limits modify what data is shown on the plot. Hadley -- Assistant Professor / Dobelman Family Junior Chair Department of Statistics / Rice University http://had.co.nz/ ______________________________________________ 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.