def get_wanted_statistics(features, statistics):
    """ Select the wanted statistics from the whole description

    Parameters
    ----------
    features : list of source features
        All source feature which you are interested in
    statistics : list of string
        The statistics you want to select
    
    Returns
    -------
    list of tuple
        Tuples in the form (feature, statistic) for all statistics and parameters
        passed as arguments
    """

    result = [[(param, stat) for stat in statistics] for param in features]
    result = [item for sublist in result for item in sublist]
    return result