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abhishek-ghose/kendal_W.py

Created July 31, 2024 07:36
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  1. abhishek-ghose created this gist Jul 31, 2024.
    18 changes: 18 additions & 0 deletions kendal_W.py
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    Original file line number Diff line number Diff line change
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    import numpy as np


    def kendall_w(scores):
    """
    :param scores: rows correspond to category levels, e.g., for QS this would be unc. sampling, CAL etc, and the
    columns correspond to the scores.
    :return:
    """
    if scores.ndim!=2:
    raise 'scores matrix must be 2-dimensional'
    m = scores.shape[0] # raters/levels
    n = scores.shape[1] # items rated
    score_ranks = np.argsort(scores, axis=1)
    denom = m**2*(n**3-n)
    rating_sums = np.sum(score_ranks, axis=0)
    S = n*np.var(rating_sums)
    return 12*S/denom