DATA MINING
Desktop Survival Guide by Graham Williams |
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Other Examples |
# Based on code from demo(ROCR) library(ROCR) data(ROCR.hiv) pp <- ROCR.hiv$hiv.svm$predictions ll <- ROCR.hiv$hiv.svm$labels pred <- prediction(pp, ll) perf <- performance(pred, "tpr", "fpr") pdf("graphics/rplot-rocr-4plots.pdf") par(mfrow = c(2, 2)) plot(perf, avg = "threshold", colorize = T, lwd = 3, main = "Standard ROC curve.") plot(perf, lty = 3, col = "grey78", add = T) perf <- performance(pred, "prec", "rec") plot(perf, avg = "threshold", colorize = T, lwd = 3, main = "Precision/Recall graph.") plot(perf, lty = 3, col = "grey78", add = T) perf <- performance(pred, "sens", "spec") plot(perf, avg = "threshold", colorize = T, lwd = 3, main = "Sensitivity/Specificity plot.") plot(perf, lty = 3, col = "grey78", add = T) perf <- performance(pred, "lift", "rpp") plot(perf, avg = "threshold", colorize = T, lwd = 3, main = "Lift chart.") plot(perf, lty = 3, col = "grey78", add = T) dev.off() |