Plot the resampled performance distribution

Display the empirical distribution of resampled RMSE values from bootstrap_performance(). The histogram shows the observed resampling distribution, while the density curve provides a smooth visual summary.

Usage

# S3 method for class 'bootstrap_performance'
autoplot(object, fill = "#E6E6E6", color = NA, ...)

Arguments

object: An object of class "bootstrap_performance", produced by bootstrap_performance().
fill: Fill colour of the histogram bars. Default is "#E6E6E6".
color: Border colour of the histogram bars. Default is NA, which removes bar borders.
...: Currently unused.

Value

A ggplot2::ggplot object.

Details

The dashed orange line marks the RMSE of the original fitted model. The dotted grey lines mark the 2.5 and 97.5 percent empirical quantiles of the resampled values when these can be calculated. Their distance provides a practical indication of sampling variability; it is not a formal prediction interval for future portfolio performance.

Author

Martin Haringa

Examples

if (FALSE) { # \dontrun{
mod1 <- glm(nclaims ~ age_policyholder, data = MTPL,
            offset = log(exposure), family = poisson())
x <- bootstrap_performance(mod1, MTPL, n_resamples = 100,
                           show_progress = FALSE)
autoplot(x)
} # }