在基R中查找参数的VIF

Question

I'm doing some multivariate linear modeling currently and need to find the variance inflation factor (vif) for each of my parameters. I usually use the car package, but I am presently not able to use external packages for R.

Is there a way to calculate vif in base R? And if there is how am I to go about calculating it?

Answer 1

Just copy the source code of car:::vif.default into your own source code. A quick glance suggests that the function doesn't contain any references to unexported car functions (which would have to be copied in addition), so it should just work as is.