In doing meta-analysis of diagnostic accuracy I produce ellipses of confidence and prediction intervals in two dimensions. How can I calculate the area of the ellipse in ggplot2 or base R?
thank you James Meyer ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.
