public void testInferrer()
        {
            IDataModel          model    = getDataModel(new long[] { 1 }, new Double?[][] { new double?[] { 3.0, -2.0, 5.0 } });
            IPreferenceInferrer inferrer = new AveragingPreferenceInferrer(model);
            double inferred = inferrer.InferPreference(1, 3);

            Assert.AreEqual(2.0, inferred, EPSILON);
        }
 public PrefRetriever(AveragingPreferenceInferrer inf)
 {
     this.inf = inf;
 }