Abstract
The focus of this chapter is on OWA functions. The formal definitions and the main properties of OWA are presented. Some extensions of the OWA functions are discussed in detail. Various methods of fitting OWA functions to empirical data are presented. This chapter ends with the discussion of the median functions and order statistics as the special cases of OWA functions.
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Notes
- 1.
I.e., Q is a monotone increasing function \([0,1]\rightarrow [0,1]\), \(Q(0)=0,Q(1)=1\) whose value Q(t) represents the degree to which t satisfies the fuzzy concept represented by the quantifier.
- 2.
This is an informal definition. The proper definition involves the concepts of distributions and measures, see, e.g., [Rud91].
- 3.
Note that in OWA, weighted median and ordinal OWA, \(x_{(k)}\) denotes the k-th largest element of \(\mathbf {x}\).
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Beliakov, G., Bustince Sola, H., Calvo Sánchez, T. (2016). Ordered Weighted Averaging. In: A Practical Guide to Averaging Functions. Studies in Fuzziness and Soft Computing, vol 329. Springer, Cham. https://doi.org/10.1007/978-3-319-24753-3_3
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