I'm working through "Mahout in Action", but using Clojure instead of
Java,, and I'm having trouble using an interface in the Mahout
library. The example is as follows:
DataModel model = new FileDataModel(new File("intro.csv"));
RecommenderEvaluator evaluator =
new AverageAbsoluteDifferenceRecommenderEvaluator();
RecommenderBuilder builder = new RecommenderBuilder() {
@Override
public Recommender buildRecommender(DataModel model)
throws TasteException {
UserSimilarity similarity = new
PearsonCorrelationSimilarity(model);
UserNeighborhood neighborhood =
new NearestNUserNeighborhood(2, similarity, model);
return
new GenericUserBasedRecommender(model, neighborhood,
similarity);
}
}:
double score = evaluator.evaluate( builder, null, model, 0.7, 1.0);
System.out.println(score);
Its the RecommenderBuilder that's giving me trouble. I've tried using
proxy with no luck. Any suggestions?
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