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Interpolation Help Please...

D

Dedpuhl

Lifer
I want to interpolate numbers from a chart. There is a simple equation that can be used to do this. Does anyone know this small formula to do general interpolation?
 
Pn-1 (x) = Summation [ [Yk] * [product(j!=k) (x - xj)] / [product(j!=k) (xk - xj)] ]

dont know if this is what you are looking for
this will make the polynomial pass throught all the points in the data
 
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