Computes the variance inflation factor (Helsel and Hirsch, 2002) for each variable in a linear regression fit.
1 2 3 4
an object of class "lm." There is no default method for
further arguments passed to or from other methods.
Added from smwrStats.
A named numeric vector containing the variance inflation factors for each variable.
Helsel, D.R. and Hirsch, R.M., 2002, Statistical methods in
water resources: U.S. Geological Survey Techniques of Water-Resources
Investigations, book 4, chap. A3, 522 p.
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