It means you don't have enough data to run a meaningful test.
On Wed, Jul 11, 2012 at 9:54 AM, Mugoma Joseph Okomba <[email protected]> wrote: > Hello, > > While running evaluate () on RecommenderIRStatsEvaluator I am getting the > error: > > java.lang.IllegalArgumentException: Illegal nDCG: NaN > > > Could this be caused by my data or the arguments to evaluate ()? This is > how I call evaluate: > > IRStatistics stats = evaluator.evaluate( > recommenderBuilder, null, model, null, 2, > GenericRecommenderIRStatsEvaluator.CHOOSE_THRESHOLD, > 1.0); > > What could I be doing wrong? > > Thanks. > > Mugoma Joseph. > > >
