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Show residuals vs fitted plot for regression models

Source: R/04-show.R
br_show_residuals.Rd

[Experimental]

This function creates residual plots to diagnose model fit. It can display:

  • Residuals vs fitted values plots for individual models

  • Multiple residual plots when multiple models are selected

  • Customizable plot appearance through ggplot2

Usage

br_show_residuals(breg, idx = NULL, plot_type = "fitted")

Arguments

breg

A regression object with results (must pass assert_breg_obj_with_results()).

idx

Index or names (focal variables) of the model(s). If NULL (default), all models are included. If length-1, shows residuals for a single model. If length > 1, shows faceted plots for multiple models.

plot_type

Character string specifying the type of residual plot. Options: "fitted" (residuals vs fitted values, default), "qq" (Q-Q plot), "scale_location" (scale-location plot).

Value

A ggplot object

See also

Other br_show: br_show_coxph_diagnostics(), br_show_fitted_line(), br_show_fitted_line_2d(), br_show_forest(), br_show_forest_ggstats(), br_show_forest_ggstatsplot(), br_show_nomogram(), br_show_risk_network(), br_show_survival_curves(), br_show_table(), br_show_table_gt()

Examples

m <- br_pipeline(mtcars,
  y = "mpg",
  x = colnames(mtcars)[2:4],
  x2 = "vs",
  method = "gaussian"
)

# Single model residual plot
br_show_residuals(m, idx = 1)
#> `geom_smooth()` using formula = 'y ~ x'


# Multiple models
br_show_residuals(m, idx = c(1, 2))
#> `geom_smooth()` using formula = 'y ~ x'


# All models
br_show_residuals(m)
#> `geom_smooth()` using formula = 'y ~ x'