yixuan/rationalfun — comment on commit e80993fa8a4410754f27c30889c02ab8058ba42e
File: R/rf_base.R line 49
By mingsnu:

1. Would please explain why to use two 'importFrom'? Because of importing two pkgs?
2. Is it means to use 'deriv', 'predict' functions from 'stats' package? But they are not used in this function, so I'm confused about it.
Thank you very much:)