code: private DataPoint getPredVecR(DataPoint data)
      {
          Vec w = new DenseVector(baseRegressors.size());
          for (int i = 0; i < baseRegressors.size(); i++)
              w.set(i, baseRegressors.get(i).regress(data));
          return new DataPoint(w);
      }
docs: Gets the predicted vector wrapped in a new DataPoint from a data point
  assuming we are doing regression
  @param data the data point to get the classifier from
  @return the vector of predictions from each regressor