Download example teaching dataset

Provides convenient access to example datasets hosted online. Currently supports the 'tips' dataset used in various tutorials.

Usage

downloadTeachingData(
  name = "tips",
  destfile = tempfile(fileext = ".csv"),
  quiet = FALSE
)

Arguments

name

Name of the dataset to download. Only "tips" is currently supported.

destfile

Optional path to save the downloaded dataset. Defaults to a temporary file.

quiet

Logical; if FALSE, informative messages are printed during the download process.

Value

Path to the downloaded dataset on success, or NULL invisibly if the download fails or no internet connection is available.

Examples

# \donttest{
# Online example (requires internet)
if (curl::has_internet()) {
  data_path <- downloadTeachingData(quiet = TRUE)
  if (!is.null(data_path)) {
    # Use downloaded data
  }
}
#> NULL
# }

# Offline example using built-in data
data(mtcars)
model <- lm(mpg ~ wt + hp, data = mtcars)
result <- performWhiteTest(model, mtcars)
#> [INFO] Running White test
#> [INFO] White test completed: statistic = 6.5431 df = 5 p = 0.2569
print(result)
#> 
#> 	White's test for heteroscedasticity
#> 
#> data:  model
#> X-squared = 6.5431, df = 5, p-value = 0.2569
#> alternative hypothesis: heteroscedasticity present
#>