Re: [R] Variation Inflation factor for GLS

, May 20, 2014 9:27 AM > To: r-help@R-project.org > Subject: [R] Variation Inflation factor for GLS > > Dear all, > I am running a gls and I would like to check the vif of my model. It > seems that the vif function in the car package and the vif.mer function > available online do

Re: [R] Variation Inflation factor for GLS

Dear Laura, There is no car::vif() method for gls objects, but the approach that car:::vif.lm() uses -- to compute VIFs (and generalized VIFs) from the correlation matrix of the coefficients -- should be applicable to models fit by gls(). I'll take a look a providing a vif.gls() method when I

[R] Variation Inflation factor for GLS

Dear all, I am running a gls and I would like to check the vif of my model. It seems that the vif function in the car package and the vif.mer function available online do not work for gls. Would you know of a method to measure variance inflation factors for GLS? Thank you Laura [[alte