add cosine similarity function

asg017 / sqlite-vss

A SQLite extension for efficient vector search, based on Faiss!

MIT License

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add cosine similarity function #77

Closed dleviminzi closed 11 months ago

dleviminzi commented 11 months ago

Decided to add a function for the cosine similarity. This is useful in the same way that the other functions are (ie: returning the metric with the result). In my particular case, I will likely want to throw out results below some threshold.

asg017 commented 11 months ago

Thanks for the contribution! Imma bet that the math here is correct, I barely passed my linear algebra class...