Package org.grouplens.lenskit.util.statistics

Examples of org.grouplens.lenskit.util.statistics.MeanAccumulator

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        return suffix;
    }

    @Override
    public MeanAccumulator createContext(Attributed algo, TTDataSet ds, Recommender rec) {
        return new MeanAccumulator();
    }
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        super(Result.class, Result.class);
    }

    @Override
    public MeanAccumulator createContext(Attributed algo, TTDataSet ds, Recommender rec) {
        return new MeanAccumulator();
    }
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        this(5);
    }

    @Override
    public MeanAccumulator createContext(Attributed algo, TTDataSet ds, Recommender rec) {
        return new MeanAccumulator();
    }
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        this.exclude = exclude;
    }

    @Override
    public MeanAccumulator createContext(Attributed algo, TTDataSet ds, Recommender rec) {
        return new MeanAccumulator();
    }
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    }

    @Test
    public void testAccumulator() {
        HLUtilityPredictMetric metric = new HLUtilityPredictMetric(5);
        MeanAccumulator acc = metric.createContext(null, null, null);
        assert acc != null;

        metric.measureUser(user1, acc);
        assertEquals(1, acc.getCount());
        assertEquals(0.9517, acc.getTotal(), 0.0001);

        metric.measureUser(user2, acc);
        assertEquals(2, acc.getCount());
        assertEquals(1.8883, acc.getTotal(), 0.0001);

        metric.measureUser(user3, acc);
        assertEquals(3, acc.getCount());
        assertEquals(2.7866, acc.getTotal(), 0.0001);
    }
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    }

    @Test
    public void testAccumulator() {
        NDCGPredictMetric metric = new NDCGPredictMetric();
        MeanAccumulator acc = metric.createContext(null, null, null);
        assertThat(acc, notNullValue());
        assert acc != null;
        metric.measureUser(user1, acc);
        assertEquals(1, acc.getCount());
        assertEquals(0.9533, acc.getTotal(), 0.0001);
        metric.measureUser(user2, acc);
        assertEquals(2, acc.getCount());
        assertEquals(1.9110, acc.getTotal(), 0.0001);
        metric.measureUser(user3, acc);
        assertEquals(3, acc.getCount());
        assertEquals(2.8069, acc.getTotal(), 0.0001);
    }
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Related Classes of org.grouplens.lenskit.util.statistics.MeanAccumulator

  • org.grouplens.lenskit.eval.metrics.predict.HLUTest
  • org.grouplens.lenskit.eval.metrics.predict.HLUtilityPredictMetric
  • org.grouplens.lenskit.eval.metrics.predict.NDCGPredictMetric
  • org.grouplens.lenskit.eval.metrics.predict.NDCGTest
  • org.grouplens.lenskit.eval.metrics.topn.NDCGTopNMetric
  • org.grouplens.lenskit.eval.metrics.topn.TopNLengthMetric
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