R Under development (unstable) (2024-09-06 r87103 ucrt) -- "Unsuffered Consequences"
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> #===============================================================================
> # SUBJECT  Test the implementation of 'wBACON_reg'
> # AUTHORS  Tobias Schoch, tobias.schoch@gmail.com
> # LICENSE  GPL >= 2
> # COMMENT  pkg 'robustbase' and 'robustX' must be installed
> #===============================================================================
> library(wbacon)
> 
> if (requireNamespace("robustX", quietly = TRUE) &
+     requireNamespace("robustbase", quietly = TRUE)) {
+ 
+     library(robustX)
+     library(robustbase)
+ 
+     #---------------------------------------------------------------------------
+     # function to compare wBACON_reg against BACON
+     #---------------------------------------------------------------------------
+     all_equal <- function(target, current, label,
+         tolerance = sqrt(.Machine$double.eps), scale = NULL,
+         check.attributes = FALSE)
+     {
+         if (missing(label))
+             stop("Argument 'label' is missing\n")
+         res <- all.equal(target, current, tolerance, scale,
+             check.attributes = check.attributes)
+         if (is.character(res))
+             cat(paste0(label, ": ", res, "\n"))
+     }
+     compare <- function(formula, data, name, alpha = 0.05, original = TRUE,
+         verbose = FALSE)
+     {
+         # our implementation
+         m <- wBACON_reg(formula, data = data, alpha = alpha,
+                         original = original, verbose = verbose)
+ 
+         # we extract the response variable and the design matrix
+         y <- as.numeric(model.response(m$model))
+         x <- model.matrix(m$terms, m$model)
+ 
+         # reference implementation (robustX)
+         ref <- suppressWarnings({
+             BACON(x[, -1], y, init.sel = "V2", alpha = alpha,
+                   verbose = verbose)
+         })
+ 
+         all_equal(m$subset, ref$subset, name)
+     }
+ 
+     # check that version 1.25 (or newer) of robustX is installed
+     robustX_version <-
+         as.numeric(gsub("-", "", getNamespaceVersion("robustX")))
+     #---------------------------------------------------------------------------
+     # Tests
+     #---------------------------------------------------------------------------
+     # We test our implementation against the method robustX::BACON for 5 well
+     # known data sets.
+     if (robustX_version >= 1.25) {
+         data(hbk, package = "robustbase")
+         compare(Y ~ ., hbk, "hbk")
+ 
+         data(aircraft, package = "robustbase")
+         compare(Y ~ ., aircraft, "aircraft")
+ 
+         data(education, package = "robustbase")
+         compare(Y ~ Region + X1 + X2 + X2, education, "education")
+ 
+         data(heart, package = "robustbase")
+         compare(clength ~ ., heart, "heart")
+ 
+         data(pulpfiber, package = "robustbase")
+         compare(Y1 ~ X1 + X2 + X3, pulpfiber, "pulpfiber")
+     }
+ }
> 
> proc.time()
   user  system elapsed 
   0.59    0.12    0.65