Revision b7c0afd9fdb886458ef54c202368a21551f6b1b6 authored by Max Kuhn on 11 June 2008, 14:44:07 UTC, committed by cran-robot on 11 June 2008, 14:44:07 UTC
1 parent 6a94bf7
aucRoc.Rd
\name{aucRoc}
\alias{aucRoc}
\title{Compute the area under an ROC curve}
\description{
This function uses the trapezoidal rule to calculate the area. If the area is less than .5, then \code{1 - area} is used.
}
\usage{
aucRoc(object)
}
\arguments{
\item{object}{object from the \code{roc} function or a matrix/data
frame with columns named "sensitivity" and "specificity"}
}
\value{
a scalar number
}
\author{Max Kuhn}
\seealso{\code{\link{sensitivity}}, \code{\link{specificity}}, \code{\link{roc}}}
\examples{
set.seed(6)
testData <- data.frame(
x = c(rnorm(200), rnorm(200) + 1),
group = factor(rep(letters[1:2], each = 200)))
densityplot(~testData$x, groups = testData$group, auto.key = TRUE)
rocValues <- roc(testData$x, testData$group)
aucRoc(rocValues)
}
\keyword{manip}
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