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From ziad kamel <ziad.kame...@gmail.com>
Subject Re: How good recommendations and precision works
Date Wed, 04 Apr 2012 03:25:13 GMT
Why we need a precision at and also threshold ? We can use only 1 of
them at a time ?

IRStatistics stats = evaluator.evaluate(recommenderBuilder,
                                            null, model, null, 5,

GenericRecommenderIRStatsEvaluator.CHOOSE_THRESHOLD,
                                            1.0);


On Mon, Apr 2, 2012 at 5:57 PM, ziad kamel <ziad.kamel25@gmail.com> wrote:
> Hi ,  When not using a threshold, the default is to use average rating
> plus one standard deviation. Assume that good recommendations was 30
> items. When we use precision at 5 , we will select only top 5 items
> from the 30 to compare with our recommendations ?

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