How can i implement a cosine-based similarity?

[chembohuang]

there are L1, L2, jaccard,, hamming, angular similarity, however, the cosine similarity is missing, r u going to implement one?

[chembohuang]

it turns out the angular function similarity is the cosine similarity :)

[alexklibisz]

Sorry, just saw this.
Yes, I'm possibly conflating "angular" and "cosine". The actual implementation is basically what you get if you lookup cosine similarity on Wikipedia.