code: public void initializeRangesEmpty(int numAtt, double[][] ranges) {
      for (int j = 0; j < numAtt; j++) {
        ranges[j][R_MIN] = Double.POSITIVE_INFINITY;
        ranges[j][R_MAX] = -Double.POSITIVE_INFINITY;
        ranges[j][R_WIDTH] = Double.POSITIVE_INFINITY;
      }
    }
docs: Used to initialize the ranges.
  
  @param numAtt 	number of attributes in the model
  @param ranges 	low, high and width values for all attributes