cosine similarity and other distance measures

[xd009642]

Title is fairly self explanatory, I've found the need for cosine distance at various times (and other distance metrics) that probably fit well in ndarray-stats. Maybe here we can decided on a few different ones and what is/isn't in scope for this crate

[LukeMathWalker]

Cosine similarity would fit quite well in the scope - we already have a bunch of distance functions, so we can definitely expand the collection.
What else do you have in mind?

[xd009642]

Hmm only other distance function I've made use of in my day to day has been KL divergence, I'm sure there's other common ones though 😄

[LukeMathWalker]

https://docs.rs/ndarray-stats/0.3.0/ndarray_stats/trait.EntropyExt.html#tymethod.kl_divergence 😁

[xd009642]

Oh well that's an easy one to cross off then 😂

Do you have any other distance metrics in mind?

[beyarkay]

Just wanted to check in on this issue? Adding cosine similarity seems like something I could do so I might take a crack if there's no other constraints.