How to calculate sigma notation in LV?

Greetings,
I am looking for a method to calculate Sigma notation (see attachment) in LV. I cannot seem to find a way using MathScript to do this.
I already attempted to manually write out code to process these formulas, but my results are offtrack (that's a seperate issue.... if someone would like to attempt to debug my code, let me know and I'll post it).
Any ideas?
Thanks.
-Ryan
Attachments:
formula.jpg ‏64 KB

We cannot debug your code unless you attach it
...agreed...
So then, I humbly submit my work for review.
The theory I'm working on here is finding a best-fit plane through some data. So we enter a bunch of points (XYZ's), and plot them to show what they look like. Then we calculate the best-fit plane, and plot it. The two planes should appear to be identical.
I'm also using a 3D control to draw the points in planar form. The first chart is built from the numbers directly to the right of it. The default numbers in the "Input array" are known to be on a common plane (not a normal condition for this program, but for a formula proof, this was easiest).
The second chart is the "Calculated" best-fit plane. The actual XYZ's are shown in the array to the right, but they are of little use to the operator.
Notice I took the step of making the X, Y, and Z scale on both charts all into a 1:1 (1:1:1...?) ratio. With that taken into consideration, the plane on the first chart should like very similar to the plane on the second chart (the compound angles should be identical, but the physical size and positioning in the chart are immaterial).
The third tab shows the raw data from the calculations.
Block diagram (don't laugh; this was only meant to be a formula proof only!):
Specifically. I'm looking for someone to verify if I'm calculating Sigma properly. You will see notations in the formula (string-constant boxes with numbers in them... the numbers correlate to the numbers on the indicators....so that the area of the formula with the "1" notation will have the result shown in the "1" indicator, etc.). I think the theory of plotting the data is in good shape.
As you can see by executing the VI....the two planes currently do not match.
Any help that can be provided will be greatly appreciated.
-Ryan
Message Edited by RWiersma on 10-30-2006 09:47 AM
Attachments:
Best-fit-plane.vi ‏89 KB

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