Dsxir.Retrieval.Cosine (dsxir v0.4.0)

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Brute-force cosine similarity over two flat float lists.

Pulled out of Dsxir.Retrieval.InMemory so the Dsxir.DemoStrategy.KNN strategy can share the same math without copy-pasting. Returns 0.0 when either vector is the zero vector, mirroring the original semantics.

Summary

Functions

similarity(a, b)

Cosine similarity in [-1.0, 1.0]. Returns 0.0 when either input is the zero vector. Raises Dsxir.Errors.Framework.PredictorError when vector lengths differ.

Functions

similarity(a, b)

@spec similarity([float()], [float()]) :: float()

Cosine similarity in [-1.0, 1.0]. Returns 0.0 when either input is the zero vector. Raises Dsxir.Errors.Framework.PredictorError when vector lengths differ.