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86 points alexop | 1 comments | | HN request time: 1.391s | source
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frotaur ◴[] No.43328389[source]
As a physicist, I always found it funny that in ML people renamed 'the angle between vectors' into something as fancy-feeling as 'cosine similarity'.
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1. gpderetta ◴[] No.43331512[source]
It is used as a distance function, so the important thing it is not that it is an angle, but that it is a similarity function.

And I think today it is preferred to call it "similarity" instead of "distance" because it is not a true distance function (15 years ago we called it "cosine distance").