code: public Recommender buildRecommender(final DataModel dataModel, final String recType, final String facType, final int iterations, final int factors)
              throws RecommenderException {
          return buildRecommender(dataModel, recType, null, NO_N, factors, iterations, facType);
      }
docs: SVD.
  
  @param dataModel the data model
  @param recType the recommender type (as Mahout class)
  @param facType the factorizer (as Mahout class)
  @param iterations number of iterations
  @param factors number of factors
  @return the recommender
  @throws RecommenderException see
  {@link #buildRecommender(org.apache.mahout.cf.taste.model.DataModel, java.lang.String, java.lang.String, int, int, int, java.lang.String)}