The following code will get me a curve plot: cutoff <- seq(1,7,0.25) Sensitivity <- 1 - pnorm(cutoff, 5, 0.8) Specificity <- pnorm(cutoff, 3, 1.2) plot(1-Specificity,Sensitivity,main = "ROC curve",type = "o")
How do I get a gradient of a particular point on that curve? Any packages/functions allow me to do that? Thank you -- View this message in context: http://r.789695.n4.nabble.com/An-issue-regarding-to-gradient-tp3893401p3893401.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.
