code: public String toDistributionString(int treshold) {
      Counter<Double> weightCounts = new ClassicCounter<Double>();
      StringBuilder s = new StringBuilder();
      s.append("Total number of weights: ").append(totalSize());
      for (int f = 0; f < weights.length; f++) {
        for (int l = 0; l < weights[f].length; l++) {
          weightCounts.incrementCount(weights[f][l]);
        }
      }
  
      s.append("Counts of weights\n");
      Set<Double> keys = Counters.keysAbove(weightCounts, treshold);
      s.append(keys.size()).append(" keys occur more than ").append(treshold).append(" times ");
      return s.toString();
    }
docs: Similar to histogram but exact values of the weights
  to see whether there are many equal weights.
  
  @return A human readable string about the classifier distribution.