pROC (version 1.3.1)

lines.roc: Add a ROC line to a ROC plot

Description

This convenience function adds a ROC line to a ROC curve.

Usage

## S3 method for class 'roc':
lines(x, ...)
## S3 method for class 'smooth.roc':
lines(x, ...)
## S3 method for class 'roc':
lines.roc(x, lwd=2, ...)
## S3 method for class 'formula':
lines.roc(x, data, ...)
## S3 method for class 'default':
lines.roc(x, predictor, ...)
## S3 method for class 'smooth.roc':
lines.roc(x, ...)

Arguments

x

a roc object from the roc function (for plot.roc.roc), a formula (for plot.roc.formula) or a response vector (for plot.roc.default).

predictor, data

arguments for the roc function.

lwd

line width (see par).

...

graphical parameters for lines, and especially type (see plot.default) and arguments for par

Value

• This function returns a list of class roc invisibly. See roc for more details.

encoding

UTF-8

See Also

roc, plot.roc

Examples

data(aSAH)

rocobj <- plot.roc(aSAH$outcome, aSAH$s100b, type="n")
lines(rocobj, type="b", pch=21, col="blue", bg="grey")

# Without using 'lines':
rocobj <- plot.roc(aSAH$outcome, aSAH$s100b, type="b", pch=21, col="blue", bg="grey")