Stem-and-leaf Plot
> stem(x, par1, par2, par3)
  The decimal point is 1 digit(s) to the right of the |
  17 | 5888
  18 | 0003333333
  18 | 5555555558888888
  19 | 0000000033
  19 | 6666888
  20 | 33
  20 | 8