Package org.grouplens.lenskit.core

Examples of org.grouplens.lenskit.core.LenskitConfiguration

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    protected final String INPUT_FILE_NAME = "u.data";

    protected EventDAO dao;

    protected LenskitConfiguration getDaoConfig() {
        LenskitConfiguration config = new LenskitConfiguration();
        config.bind(EventDAO.class).to(dao);
        return config;
    }
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        rs.add(Ratings.make(5, 8, 3));
        rs.add(Ratings.make(6, 8, 2));
        rs.add(Ratings.make(1, 9, 3));
        rs.add(Ratings.make(3, 9, 4));

        LenskitConfiguration config = new LenskitConfiguration();
        config.bind(EventDAO.class).to(EventCollectionDAO.create(rs));
        config.bind(ItemScorer.class).to(WeightedSlopeOneItemScorer.class);
        config.bind(PreferenceDomain.class).to(new PreferenceDomainBuilder(1, 5)
                                                       .setPrecision(1)
                                                       .build());
        ItemScorer predictor = LenskitRecommenderEngine.build(config)
                                                       .createRecommender()
                                                       .getItemScorer();
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        rs.add(Ratings.make(2, 6, 3));
        rs.add(Ratings.make(1, 7, 4));
        rs.add(Ratings.make(2, 7, 4));
        rs.add(Ratings.make(3, 7, 1.5));

        LenskitConfiguration config = new LenskitConfiguration();
        config.bind(EventDAO.class).to(EventCollectionDAO.create(rs));
        config.bind(ItemScorer.class).to(WeightedSlopeOneItemScorer.class);
        config.bind(PreferenceDomain.class).to(new PreferenceDomainBuilder(1, 5)
                                                       .setPrecision(1)
                                                       .build());
        ItemScorer predictor = LenskitRecommenderEngine.build(config)
                                                       .createRecommender()
                                                       .getItemScorer();
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        rs.add(Ratings.make(1, 7, 4));
        rs.add(Ratings.make(8, 4, 5));
        rs.add(Ratings.make(8, 5, 4));
        EventDAO dao = new EventCollectionDAO(rs);

        LenskitConfiguration config = new LenskitConfiguration();
        config.bind(EventDAO.class).to(dao);
        config.bind(ItemItemModel.class).toProvider(NormalizingItemItemModelBuilder.class);
        config.bind(ItemScorer.class).to(ItemItemScorer.class);
        config.bind(GlobalItemScorer.class).to(ItemItemGlobalScorer.class);
        // this is the default
//        factory.setComponent(UserVectorNormalizer.class, VectorNormalizer.class,
//                             IdentityVectorNormalizer.class);

        engine = LenskitRecommenderEngine.build(config);
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    public File perform() throws TaskExecutionException {
        if (output == null) {
            logger.error("no output file specified");
            throw new IllegalStateException("no graph output file specified");
        }
        LenskitConfiguration daoConfig = new LenskitConfiguration();
        daoConfig.bind(EventDAO.class).toProvider(Providers.<EventDAO>of(null, EventDAO.class));
        if (domain != null) {
            daoConfig.bind(PreferenceDomain.class).to(domain);
        }

        RecommenderGraphBuilder rgb = new RecommenderGraphBuilder();
        rgb.addConfiguration(daoConfig);
        rgb.addConfiguration(algorithm.getConfig());
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    LenskitRecommender recommender;

    @Before
    public void createRecommender() throws RecommenderBuildException {
        LenskitConfiguration config = new LenskitConfiguration();
        config.addRoot(ItemDAO.class);
        config.bind(ItemDAO.class).to(FixedItemDAO.class);
        config.bind(EventDAO.class).to(EventCollectionDAO.create(Collections.<Rating>emptyList()));
        recommender = LenskitRecommender.build(config);
    }
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            return SimpleFileRatingDAO.create(inputFile, delimiter);
        }

        @Override
        public LenskitConfiguration getConfiguration() {
            LenskitConfiguration config = new LenskitConfiguration();
            config.addComponent(getEventDAO());
            return config;
        }
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            return BinaryRatingDAO.open(inputFile);
        }

        @Override
        public LenskitConfiguration getConfiguration() {
            LenskitConfiguration config = new LenskitConfiguration();
            config.addComponent(BinaryRatingDAO.class);
            config.bind(BinaryRatingFile.class, File.class)
                  .to(inputFile);
            return config;
        }
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        rs.add(Ratings.make(6, 8, 2));
        rs.add(Ratings.make(1, 9, 3));
        rs.add(Ratings.make(3, 9, 4));

        dao = new EventCollectionDAO(rs);
        LenskitConfiguration config = new LenskitConfiguration();
        config.bind(PreferenceSnapshot.class).to(PackedPreferenceSnapshot.class);
        config.bind(ItemScorer.class).to(FunkSVDItemScorer.class);
        config.bind(BaselineScorer.class, ItemScorer.class)
              .to(UserMeanItemScorer.class);
        config.bind(Integer.class).withQualifier(FeatureCount.class).to(100);
        // FIXME: Don't use 100 features.
        RecommenderEngine engine = LenskitRecommenderEngine.build(config);
        svdRecommender = engine.createRecommender();
        recommender = svdRecommender.getItemRecommender();
    }
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        rs.add(Ratings.make(1, 9, 3));
        rs.add(Ratings.make(3, 9, 4));
        rs.add(Ratings.make(6, 9, 4));
        rs.add(Ratings.make(5, 9, 4));
        EventDAO dao = new EventCollectionDAO(rs);
        LenskitConfiguration config = new LenskitConfiguration();
        config.bind(EventDAO.class).to(dao);
        config.bind(ItemScorer.class).to(UserUserItemScorer.class);
        config.bind(NeighborFinder.class).to(LiveNeighborFinder.class);
        config.within(UserSimilarity.class)
              .bind(VectorSimilarity.class)
              .to(PearsonCorrelation.class);
        // this is the default
/*        factory.setComponent(UserVectorNormalizer.class,
                             VectorNormalizer.class,
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Related Classes of org.grouplens.lenskit.core.LenskitConfiguration

  • org.grouplens.grapht.BindingFunctionBuilder
  • org.grouplens.lenskit.cli.InputData$PackedInput
  • org.grouplens.lenskit.cli.InputData$TextInput
  • org.grouplens.lenskit.cli.TrainModel
  • org.grouplens.lenskit.config.ConfigHelpers
  • org.grouplens.lenskit.config.LenskitConfigDSL
  • org.grouplens.lenskit.eval.algorithm.AlgorithmInstanceBuilder
  • org.grouplens.lenskit.eval.graph.DumpGraphTask
  • org.grouplens.lenskit.eval.metrics.topn.ItemSelectorsTest
  • org.grouplens.lenskit.eval.TrainModelTask
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