I doubt you will find a "tutorial" on the internet for a problem like this. I would expect that the most difficult part of the problem is getting the disconnected data that you have right now into a properly organized table. I would probably build this table using the INDEX() function http://office.microsoft.com/en-us/ma...777.aspx?CTT=1 It might look something like:
where pointoffset is the number of rows between points (looks like it should be about 15), and xoffset and yoffset are the number of rows the x data and y data are offset from the reference row you are using.
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