code: public static Assignments cluster(Matrix matrix,
                                        int numClusters,
                                        int numRepetitions) {
          return cluster(matrix, numClusters, numRepetitions,
                         new RandomSeed(), new I1Function());
      }
docs: Clusters {@link matrix} using the {@link RandomSeed} seeding algorithm
  and the default kmeans {@link CriterionFunction}.  The best scoring
  solution out of {@code numRepetitions} will be returned.