Hi, I want to plot ROC curve for my detection algorithm which detects features in different images at two different thresholds.
6 different images used and obtained tp, fp and fn. No tn in my case. in first threshold run i obtained 6 values of tp,fp and fn. In second threshold run agian i got 6 more. i had calculated tpr and fpr. How to plot ROC in this case. Is this possible to plot ROC curve in this case? If s, please guide me to plot that. thank you. http://r.789695.n4.nabble.com/file/n4640474/in1.png -- View this message in context: http://r.789695.n4.nabble.com/no-true-negative-data-need-roc-curve-tp4640474.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.
