# 3D Ribbon chart data:
# Each data series consists of three rows: 
# 2 data rows with the same values represent the ribbon
# ribbons carved out of the surface by separating them with a row of "holes" 
IGRID 10 7
-1

0.75 1 2 2.5 3.0 4.0 4.5 5.0 6.0 6.25
0.75 1 2 3 4 5 5.25

-1 -1 -1 -1 -1 -1 -1
-1 5 8 14 19 24 -1
-1 5 8 14 19 24 -1
-1 -1 -1 -1 -1 -1 -1
-1 11 15 18 21 22. -1
-1 11 15 18 21 22. -1
-1 -1 -1 -1 -1 -1 -1
-1 14 16 15.5 15.2 15.4 -1
-1 14 16 15.5 15.2 15.4 -1
-1 -1 -1 -1 -1 -1 -1