07-01-2012 10:49 AM - edited 07-01-2012 10:50 AM
If you can assume that the first two column values are always arranged very regularly:
x1 y1
x2 y1
x3 y1
x1 y2
x2 y2
x3 y2
x1 y3
etc.
You could do something like the following. Modify as needed.