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Andrei Dimaano's avatar

Gaurav, this is such an amazing series on RecSys!!

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Gaurav Chakravorty's avatar

Thanks!

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Prateek Verma's avatar

Great series on Recys Gaurav! Thanks for writing it :)

Just nitpicking a little, I think the NDCG cannot be optimized directly as it is a non-differentiable metric. To overcome this, some modified form of NDCG should be used. Google proposed ApproxNDCCG here:

https://dl.acm.org/doi/pdf/10.1145/3331184.3331347

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