Validate model argument

Source: R/utils.R · Help: ?checkModel

Checks that model is of class lm or glm. With enhanced = TRUE it also runs the soft checks of the deprecated checkModelEnhanced(): it warns when the residual degrees of freedom fall below six, when a near-perfect fit is detected (R\(^2 > 0.999\)), or, when data is given, when a variance inflation factor exceeds 10 (Belsley et al., 1980).

Usage

checkModel(model, data = NULL, enhanced = FALSE)

Arguments

model

An object to check.

data

Optional data.frame used when fitting model. With enhanced = TRUE it enables the multicollinearity check through performVIFDiagnostic().

enhanced

Logical. FALSE, the default, checks the class only.

Value

Invisible model if valid, otherwise an error is thrown.

References

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