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make normalization a transformation #69
Right now the similarity computations assume cosine similarity and transform all vectors to unit length implicitly, inside the
Instead, make normalization an explicit transformation and leave it up to the user to choose which (or whether) normalization to use. Example
The most common cases (L2 norm, L1 norm, identity) should be pre-defined, probably in
Also connected is issue #64 (allow custom similarity metrics).