code: public Predictor sunspot(double... sunspot)
      {
          CommandLine<Double> line = new CommandLine<>(SUNSPOT, 5);
          for (double s : sunspot)
          {
              line.add(s);
          }
          input.add(line);
          return this;
      }
docs: The sunspot command line indicates the sunspot numbers of the solar
  activity period of interest and is the 12-month smoothed mean for each of
  the months specified.
  
  @param sunspot
  @return