metrics

Experimenting with different distance metrics, coded as ES6 modules. Start with simplest example, Euclidean Distance. Note not all distances will be true metrics, for example, cosine distance does not satisfy triangular inequality, as demonstrated here:

A=[1,0];
B=[0.6,0.8];
C=[-0.8,0.6];

Geeting the metrics module

mod = (await import('https://epiverse.github.io/metrics/basic.mjs'))

show an example of triangular innequality not being satisfied by cosine distance:

dAB = mod.cosine(A,B) = 0.4
dBC = mod.cosine(B,C) = 1
dAC = mod.cosine(A,C) = 1.8
dAC<=(dAB+dBC) = false

For more discussion of the metrics modules see the metrics wiki

• Live at https://epiverse.github.io/metrics