Clemens Westrup cle-ment
cle-ment
/ find-index-of-combination-in-arrays.ipynb
Last active
March 16, 2017 06:41
Find index of combination over arrays
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cle-ment
/ Normalized Discounted Cumulative Gain
Created
March 17, 2017 09:03
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| def dcg(relevances, rank=10): | |
| """Discounted cumulative gain at rank (DCG)""" | |
| relevances = np.asarray(relevances)[:rank] | |
| n_relevances = len(relevances) | |
| if n_relevances == 0: | |
| return 0. | |
| discounts = np.log2(np.arange(n_relevances) + 2) | |
| return np.sum(relevances / discounts) | |
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