Preprocess data generic
do_preprocess(obj, ...)
The same `pk` object, with added elements `data` (containing the cleaned, gap-filled data) and `data_info` (containing summary information about the data, e.g. number of observations by route, media, detect/nondetect; empirical tmax, time of peak concentration for oral data; number of observations before and after empirical tmax)
the pk object.
Additional arguments currently not in use.
[do_preprocess.pk()] for the `do_preprocess` method for class [pk()]