Please add an reproducible example, so that we can see where it goes wrong. Maybe the error is raised by faulted data?
Bart -- View this message in context: http://n4.nabble.com/problems-with-SPC-charts-in-R-tp1467901p1468441.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.
