ggRandomForests (version 2.2.0)

calc_auc: Area Under the ROC Curve calculator

Description

Area Under the ROC Curve calculator

Usage

calc_auc(x)

Value

AUC. 50% is random guessing, higher is better.

Arguments

x

gg_roc object

Details

calc_auc uses the trapezoidal rule to calculate the area under the ROC curve.

This is a helper function for the gg_roc functions.

See Also

calc_roc gg_roc

plot.gg_roc

Examples

##
## Taken from the gg_roc example
# rfsrc_iris <- rfsrc(Species ~ ., data = iris)
data(rfsrc_iris)

if (FALSE) {
gg_dta <- gg_roc(rfsrc_iris, which.outcome=1)

calc_auc(gg_dta)
}

gg_dta <- gg_roc(rfsrc_iris, which.outcome=2)

calc_auc(gg_dta)

## randomForest tests
rf_iris <- randomForest::randomForest(Species ~ ., data = iris)
gg_dta <- gg_roc(rfsrc_iris, which.outcome=2)

calc_auc(gg_dta)