Abstract interface that collects all similarity measures for
Another possibility to describe the similarity between two numeric values is by an exponential
Is providing fuzzy similarity functionality, according to the paper: Case-based Reasoning for
Diagnosis of Stress using Enhanced Cosine and Fuzzy Similarity; by M.
In most cases the similarity between two numeric values can be described by a linear function.
We can also use sigmoid functions as a generalization of threshold functions.
Threshold functions should be used if there is the possibility that the contribution of an
attribute to the utility is binary in the sense that up to a certain difference the case is
useful and beyond it is not useful.