| CosineSimilarity |
Given two vectors compute cos(theta) where theta is the angle between the two vectors in a N-dimensional vector space. |
| Euclidean |
This class computes the very simple euclidean distance between two vectors ( sqrt(sum((a_i-b_i)^2)) ). |
| HammingDistance |
This class implements the hamming distance of two strings or sets. |
| JaccardIndex |
http://en.wikipedia.org/wiki/Jaccard_index |
| Simhash |
Simhash is an implementation of the locality sensitive hash function families proposed by Moses Charikar using the Earth Mover's Distance http://www.cs.princeton.edu/courses/archive/spring04/cos598B/bib/CharikarEstim.pdf |