docs: def write_average_score_row(fp, score_name, scores):
      """
      Simple utility function that writes an average score row in a file designated by a file pointer.
  
      Inputs:  - fp: A file pointer.
               - score_name: What it says on the tin.
               - scores: An array of average score values corresponding to each of the training set percentages.
      """
      row = "--" + score_name + "--"
      fp.write(row)
      for vector in scores:
          row = list(vector)
          row = [str(score) for score in row]
          row = "\n" + "\t".join(row)
          fp.write(row)