code: public void load(File... files) throws IOException {
          setFeatureStats(DistributionStats.load(files[0], files[1]));
          if (isFitLabel()) {
              setLabelStats(DistributionStats.load(files[2], files[3]));
          }
      }
docs: Load the means and standard deviations from the file system
  
  @param files the files to load from. Needs 4 files if normalizing labels, otherwise 2.