code: public void configure(int iterations, int burnIn, int thinInterval,
          int sampleLag) {
          ITERATIONS = iterations;
          BURN_IN = burnIn;
          THIN_INTERVAL = thinInterval;
          SAMPLE_LAG = sampleLag;
      }
docs: Configure the gibbs sampler
  
  @param iterations
  number of total iterations
  @param burnIn
  number of burn-in iterations
  @param thinInterval
  update statistics interval
  @param sampleLag
  sample interval (-1 for just one sample at the end)