/**
   * Save model to file
   *
   * @param fileName
   */
  public void save(String fileName) {
    StringBuilder sb = new StringBuilder();
    sb.append("marker_type\tsize\tcount\tbinomial_p\n");

    probabilities();
    for (String mtype : markerTypes.markerTypesClass())
      sb.append(mtype + "\t" + countBases.get(mtype) + "\t" + countMarkers.get(mtype) + "\n");

    Gpr.toFile(fileName, sb.toString());
  }