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 <[email protected]> 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 ?
