ratingslib.ratings.metrics module

This module implements evaluation metrics.

kendall_tau_table(ratings_dict: Dict[str, DataFrame], print_out: bool = True) → List[List[float]]

Kendall Tau comparison of ranking lists.

Parameters

• ratings_dict (Dict[str, pd.DataFrame]) – Dictionary that maps names to ratings. Note that ratings are stored in a pandas.DataFrame.

• print_out (bool) – If True then print results table.

Returns

kendall_results – Table of Kendall tau results. The lower diagonal elements represent Kendall’s tau values of each pair, while the upper diagonal elements the p-values of each pair from the two-sided hypothesis test, whose null hypothesis is an absence of association

Return type

List[List[float]]