Root Variance Inflation Factors

Calculate root variance inflation factors (RVIF) for terms in a fitted model(s), i.e. the square root of the (generalised) VIFs.

Usage

RVIF(...)

Arguments

...

Arguments to VIF().

Value

A numeric vector of the RVIFs, or an array, list of vectors/arrays, or nested list.

Details

RVIFs quantify the inflation of estimate standard errors due to multicollinearity among predictors, and also of estimates themselves compared to the 'unique' (residualised) effects. RVIFs may often be more practical than VIFs for assessing multicollinearity, relating more directly to the parameters of interest.