NCLの隠しオプション

$ ncl -h
Usage: ncl -hnpxV  
  -n: don't enumerate values in print()
  -p: don't page output from the system() command
  -o: retain former behavior for certain backwards-incompatible changes
  -x: echo NCL commands
  -V: print NCL version and exit
  -h: print this message and exit

            /* NOT ADVERTISED!  Will override "no echo" and print EVERYTHING! */
            case 'X':
                NCLoverrideEcho = 1;
                break;

            /* NOT ADVERTISED!  Will not echo copyright notice! */
            case 'Q':
                NCLnoCopyright = 1;
                break;