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mahout学习（一）
mahout主页:http://mahout.apache.org/
mahout maven:
<dependency> <groupId>org.apache.mahout</groupId> <artifactId>mahout-core</artifactId> <version>0.9</version></dependency>参考：http://mahout.apache.org/users/recommender/userbased-5-minutes.html
例子：
public class TMahout { public static void main(String[] args) throws IOException, TasteException { DataModel model = new FileDataModel(new File("path/dataset.csv")); UserSimilarity similarity = new PearsonCorrelationSimilarity(model); UserNeighborhood neighborhood = new ThresholdUserNeighborhood(0.1, similarity, model); UserBasedRecommender recommender = new GenericUserBasedRecommender(model, neighborhood, similarity); List<RecommendedItem> recommendations = recommender.recommend(2, 3); for (RecommendedItem recommendation : recommendations) { System.out.println(recommendation); } RecommenderEvaluator evaluator = new AverageAbsoluteDifferenceRecommenderEvaluator(); RecommenderBuilder builder = new RecommenderBuilder() { @Override public Recommender buildRecommender(DataModel dataModel) throws TasteException { UserSimilarity similarity = new PearsonCorrelationSimilarity(dataModel); UserNeighborhood neighborhood = new ThresholdUserNeighborhood(0.1, similarity, dataModel); return new GenericUserBasedRecommender(dataModel, neighborhood, similarity); } }; double result = evaluator.evaluate(builder, null, model, 0.9, 1.0); System.out.println(result); }}
mahout学习（一）
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