ROC: Plots A ROC Curve and computes AUC

In HervePerdry/M1SP: Examples for the Master 1 de Santé Publique

Plots A ROC Curve and computes AUC

Description

Plots A ROC Curve and computes AUC

Usage

ROC(formula, data, plot = TRUE, add = FALSE, ...)

Arguments

formula	an object of class formula.
data	an optional data frame containing the variables in the model.
plot	if TRUE, the function plots the ROC curve
add	if TRUE, the ROC curve is added to an existing plot
...	extra parameters for the plot function

Value

an invisible list with components x (the specificity), y (the sensitivity), and AUC (the AUC).

Examples

ROC(T21 ~ hCG, data = T21)
ROC(T21 ~ I(-AFP), T21, add = TRUE, lty = 2)
ROC(T21 ~ I(hCG/100 - 6.8*AFP + 51*age.gest + 33*age), data = T21, add = TRUE, col = "red")
abline(0,1,lty=3)
legend("bottomright", lty = c(1,2,1),
       col = c("black", "black", "red"), legend = c("hCG", "-AFP", "all vars"))

HervePerdry/M1SP documentation built on Dec. 16, 2024, 8:19 p.m.