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ml-recall

#ndcg

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Question 1: Short answer

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A ranking returns 4 documents with graded relevance [3,2,0,1][3, 2, 0, 1] (in rank order). Using DCG=∑i=14relilog⁡2(i+1)\mathrm{DCG} = \sum_{i=1}^{4} \frac{\mathrm{rel}_i}{\log_2(i+1)} and normalizing by the DCG of the ideal order [3,2,1,0][3, 2, 1, 0], what is the NDCG? Give 3 decimals.

a number between 0 and 1, 3 decimals