Area Under the ROC Curve calculator

Area Under the ROC Curve calculator

Usage

calc_auc(x)

Arguments

x

gg_roc object

Value

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

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)

gg_dta <- gg_roc(rfsrc_iris, which_outcome = 1)

calc_auc(gg_dta)
#> [1] 1

gg_dta <- gg_roc(rfsrc_iris, which_outcome = 2)

calc_auc(gg_dta)
#> [1] 1

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

calc_auc(gg_dta)
#> [1] 1