On Fri, 28 Sep 2012, David Winsemius wrote:
Wouldn't that involve specifying the 'subset' parameter (if bwplot accepts a subset argument) or using the 'subset' function to pass the desired rows to the data argument if it doesn't?
David, That's what I tried:
bwplot(quant ~ param | era, data=mg.d, main='Magnesium', ylab='Concentration (mg/L)', subset=era('Pre-mining'))
Perhaps I didn't write it correctly. Thanks, Rich ______________________________________________ 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.
