ScoreQuadraticWeightedKappa: Compute the quadratic weighted kappa

Description

This function computes the quadratic weighted kappa between two vectors of integers

ScoreQuadraticWeightedKappa(rater.a, rater.b, min.rating,
    max.rating)

rater.a

is the first rater's ratings

rater.b

is the second rater's ratings

min.rating

is the minimum possible rating

max.rating

is the maximum possible rating