Difference between revisions of "Discounted cumulative gain"
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'''Discounted Cumulative Gain''' is a measure for ranking quality and measures the usefulness (gain) of an item based on its relevance and position in the provided list. For comparing different lists of recommendations with various lengths, '''normalized Discounted Cumulative Gain''' or '''nDCG''' is used. It is based on dividing DCG by '''Ideal Discounted Cumulative Gain''' or '''IDCG'''. The more nDCG is, the better ranked list is provided. | '''Discounted Cumulative Gain''' is a measure for ranking quality and measures the usefulness (gain) of an item based on its relevance and position in the provided list. For comparing different lists of recommendations with various lengths, '''normalized Discounted Cumulative Gain''' or '''nDCG''' is used. It is based on dividing DCG by '''Ideal Discounted Cumulative Gain''' or '''IDCG'''. The more nDCG is, the better ranked list is provided. | ||
| + | == External links == | ||
[[Wikipedia: Discounted cumulative gain]] | [[Wikipedia: Discounted cumulative gain]] | ||
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[[Category:Evaluation measure]] | [[Category:Evaluation measure]] | ||
Revision as of 08:52, 22 February 2011
Discounted Cumulative Gain is a measure for ranking quality and measures the usefulness (gain) of an item based on its relevance and position in the provided list. For comparing different lists of recommendations with various lengths, normalized Discounted Cumulative Gain or nDCG is used. It is based on dividing DCG by Ideal Discounted Cumulative Gain or IDCG. The more nDCG is, the better ranked list is provided.
