Just as it suggests in the documentation, eg
r2(mymodel, :CoxSnell)
Note that in the source, the docstring says :MacFadden but the source has :McFadden, please open an issue.
Just as it suggests in the documentation, eg
r2(mymodel, :CoxSnell)
Note that in the source, the docstring says :MacFadden but the source has :McFadden, please open an issue.