Discounted cumulative gain
Revision as of 09:43, 6 June 2011 by Zeno Gantner (talk | contribs)
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 the DCG by the Ideal Discounted Cumulative Gain or IDCG. The higher the nDCG, the better ranked list.
