Enhanced model diagnostics (deprecated)¶

Source: R/validation.R · Help: ?checkModelEnhanced

Deprecated since 0.14.0: use checkModel(model, data, enhanced = TRUE), which runs the same checks. This name still works and warns.

Usage¶

checkModelEnhanced(model, data = NULL)

Arguments¶

model: Fitted model supplied to subsequent diagnostics.
data: Optional data.frame used when fitting model. When provided it enables multicollinearity checks via performVIFDiagnostic().

Value¶

Invisibly returns model after issuing any relevant warnings.

Details¶

Extends checkModel() with additional soft checks that flag potential numerical issues before computationally expensive diagnostics are executed. The helper mirrors the warnings used throughout the package and retains the original return semantics for backward compatibility.

The function warns when residual degrees of freedom fall below six, when a near-perfect fit is detected (R\(^2 > 0.999\)), or when variance inflation factors (VIFs) exceed 10. The latter threshold follows the regression diagnostics literature (Belsley et al., 1980).

References¶

Belsley, D. A., Kuh, E., & Welsch, R. E. (1980). Regression Diagnostics: Identifying Influential Data and Sources of Collinearity. Wiley.

Examples¶

data(mtcars)
fit <- stats::lm(mpg ~ wt + hp, data = mtcars)
checkModel(fit, enhanced = TRUE)