Measuring the directional distance between fuzzy sets
McCulloch, Josie and Wagner, Christian and Aickelin, Uwe (2013) Measuring the directional distance between fuzzy sets. In: UKCI 2013, the 13th Annual Workshop on Computational Intelligence, 9-11 Sept 2013, University of Surrey.
The measure of distance between two fuzzy sets is a fundamental tool within fuzzy set theory. However, current distance measures within the literature do not account for the direction of change between fuzzy sets; a useful concept in a variety of applications, such as Computing With Words. In this paper, we highlight this utility and introduce a distance measure which takes the direction between sets into account. We provide details of its application for normal and non-normal, as well as convex and non-convex fuzzy sets. We demonstrate the new distance measure using real data from the MovieLens dataset and establish the benefits of measuring the direction between fuzzy sets.
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