Cross-referencing other libraries

[BradKML]

There are dead libraries that might have useful features, it would be good to take a peak.

• https://github.com/recommenders/rival/wiki/Evaluation-Metrics
• https://mendeley.github.io/mrec/api.html

[statisticianinstilettos]

this is great find. I reviewed both sources and Item similarity is already covered by recmetrics "personalization" metrics. However, Discounted Cumulative Gain (DCG) and normalized Discounted Cumulative Gain (nDCG/NDCG) is likely worth adding to recmetrics. I'll take it down as a feature request.

[itsoum]

@statisticianinstilettos I am using last 6 months Discounted Cumulative Gain (DCG) and normalized Discounted Cumulative Gain (nDCG/NDCG) for evaluation in a problem which looks as a combination of a typical multi-label classification but with order of labels to be important (ranking problem). Here is a nice explanation of them with also some other usefull metrics: https://amitness.com/2020/08/information-retrieval-evaluation/
I am thinking undertake this enhancement issue given that I know the structure of your project because I have commit some metrics in the past and I don't say no to another Hacktoberefest t-shirt :)
Is it ok?

[statisticianinstilettos]

hey @itsoum, yes that would be great if you can undertake adding the new metrics. Feel free to email if you need any support. Thanks!