# Irregular grid has 5 by 3 points
  # Holes have value 100.00
  # 5 x values are give
  # 3 y values are given
  IGRID
  
  5  'A A' 'B' 'C' 'D' 'EE'

  
  3  'Yippee' 'Yahoo' 'Y3'

  
  100.0
  
  20 21.1 22.3 23 24.4 
  50.3 51.3 52.6 

  # 15 Data values follow
  23.34343 12.89239 11.99423 15.781212 18.18989
  26.828125 24.0000 21.656875 19.375000 17.39062 16.222 18.444 23.555
  58.664 37.894564