Permutation Importance Bar Plot

Creates a horizontal bar chart showing the average permutation importance (delta Net Benefit) for each predictor across the evaluated models.

Usage

VIF_plot(all_models, filter = NULL, color = "#2A6EBB")

Arguments

all_models

Data frame returned in the all_models element of nb_varsel(). Must include VIF_* columns (generated when permutation = TRUE).

filter

Integer or NULL. If specified, only the top filter models (by Avg_Net_Benefit) are used to compute average importance. Defaults to NULL (use all models).

color

Character string. Fill color for the bars. Defaults to "#2A6EBB".

Value

A list containing two elements:

plot

A ggplot2::ggplot object of the bar chart.

data

A data frame containing the Variable and Average_Delta_NB values.

Examples

if (FALSE) { # \dontrun{
result <- nb_varsel(
  data = df, outcome_var = "Y", costs = harms,
  mode = "exhaustive", permutation = TRUE,
  splines = FALSE, allow_parallel = FALSE
)
vif_results <- VIF_plot(result$all_models)

# View the plot
print(vif_results$plot)

# View the values
print(vif_results$data)
} # }