The score is computed according to
Vector of numeric values (e.g. height of histogram bins)
Length of x (just a precaution currently)
q = ((N-1) - sum_i( ((N-i-1)*x_i) ) / (N-1)
Scores range from 0 (worst), to 1 (best). E.g. c(0,0,0,16) would yield a score of 1. c(16,0,0,0,0) gives a score of 0.
Quality score in the range of [0,1]
1 2 3 4 5
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