Calculates the F2 score from a confusion matrix object with an option to include bootstrapped confidence intervals. The F2 score weights recall higher than precision.
Arguments
- cm
A dx_cm object created by
dx_cm().- detail
Character specifying the level of detail in the output: "simple" for raw estimate, "full" for detailed estimate including 95% confidence intervals.
- boot
Logical specifying if confidence intervals should be generated via bootstrapping. Note, this can be slow.
- bootreps
The number of bootstrap replications for calculating confidence intervals.
Value
Depending on the detail parameter, returns a single numeric value of
F2 or a data frame with the F2 and its confidence intervals.
See also
dx_fbeta(), dx_f1() for other F-beta scores.
Examples
cm <- dx_cm(dx_heart_failure$predicted, dx_heart_failure$truth,
threshold =
0.5, poslabel = 1
)
simple_f <- dx_f2(cm, detail = "simple")
detailed_f <- dx_f2(cm)
print(simple_f)
#> [1] 0.7188161
print(detailed_f)
#> # A tibble: 1 × 8
#> measure summary estimate conf_low conf_high fraction conf_type notes
#> <chr> <chr> <dbl> <dbl> <dbl> <chr> <chr> <chr>
#> 1 F2 Score 0.72 0.719 NA NA "" NA Specify `boot…