Implement MAP@k

[j-adamczyk]

MAP@k implementation linked in the documentation (https://github.com/benhamner/Metrics) has not been updated for 7 years and has bugs in MAP@k implementation (e.g. benhamner/Metrics#51, benhamner/Metrics#57). It would be really useful to have MAP@k implementation in recmetrics. Would it be possible to implement it? It would be almost identical to the existing mark() function.

[j-adamczyk]

Also, is MAR@k correct? It is almost exactly the MAP@k from ml_metrics, but with one bug fixed in the last line.

[Alex-Bujorianu]

I have this issue too. How can something so basic not be implemented in a library named recmetrics?

[statisticianinstilettos]

Hey everyone! Thanks for the feedback. I'd love to implement MAP@k in recmetrics, but I dont have the bandwidth today (I work for a startup :-) ) If anyone from the community is interested in contributing, I can review PRs and get it merged.

[statisticianinstilettos]

Thanks dream team. Love the community contributions to this one. :-)