axle.ml.distance
Cosine
http://en.wikipedia.org/wiki/Cosine_similarity
n = num columns in row vectors
http://math.stackexchange.com/questions/102924/cosine-similarity-distance-and-triangle-equation
Also see:
Metric Distances Derived from Cosine Similarity and Pearson and Spearman Correlations http://arxiv.org/pdf/1208.3145.pdf
one distance in terms of similarity:
1d - 2d *abs(acos(similarity(u, v)) / Pi)
Cosine
http://en.wikipedia.org/wiki/Cosine_similarity
n = num columns in row vectors
http://math.stackexchange.com/questions/102924/cosine-similarity-distance-and-triangle-equation
Also see:
Metric Distances Derived from Cosine Similarity and Pearson and Spearman Correlations http://arxiv.org/pdf/1208.3145.pdf
one distance in terms of similarity:
1d - 2d *abs(acos(similarity(u, v)) / Pi)