r_data:r_data_frame_to

Translate a 2-dimensional R dataframe into a list of compound terms, each representing a row. The functor of each row is Functor. For example:

?- r_data_frame_to_rows(mtcars, car, Rows).
Rows = [ car(21.0, 6, 160.0, 110, 3.9, 2.62, 16.46, 0, 1, 4, 4),
         ...
       ].