Add support for correlation based distances

[oren0e]

Hi,

Is it possible to add the Spearman and Pearson correlation-based distances? I can't implement spearman by myself as a user-defined function because I lack the knowledge in C++.

Thanks, and this is a great package!

[altintasali]

Hi oren0e,

I was just about to task for support on correlation based distances and I have noticed that you have already opened the thread. I am with you when it comes to C++ implementation. By any chance, have you managed to find a solution? Hope alexeckert can help us with this.

[oren0e]

I think I ended up using another package which I don't recall at this point. Will have to check, it was quite a while ago.

[altintasali]

Thanks @oren0e, I really appreciate if you can find it and let me know. I hope @alexeckert can provide a solution as I truly find his package parallelDist super useful. Among many benchmarked distance calculation packages, I found his package the best performing.