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  1. Mahout
  2. MAHOUT-1453

ImplicitFeedbackAlternatingLeastSquaresSolver add support for user supplied confidence functions

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      double confidence(double rating)

      { return 1 + alpha * rating; }

      The original paper mentions other functions that could be used as well. @ the moment It's not easy for a user to change this without compiling the source.

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            ssc Sebastian Schelter
            adamilardi Adam Ilardi
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