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Which is the right Variance Inflation Factor? #6

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LucSteinbuch opened this issue Jan 19, 2017 · 0 comments

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LucSteinbuch commented Jan 19, 2017 •

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Hi,
different packages can have the same function names, with apparently different answers:

> faraway::vif(glm_model_01)
      xtr       ytr        zy 
 47.33423 165.86142  54.32065 
> car::vif(glm_model_01)
     xtr      ytr       zy 
3.595677 5.942626 5.709125 
> faraway::vif(df_pnts[,c("xtr","ytr","zy")])  # this are the covariates for the glm 
     xtr      ytr       zy 
1.071232 1.036858 1.091488 
> #car::vif(df_pnts[,c("xtr","ytr","zy")]) ERROR: car::vif needs a lm or glm

So, which numbers are the right ones?

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