Posted By:
31 Mar, 2013 9:22 pm PDT

Lagrangian polynomial fitting or interpolation for given set of points

I have the following data sets, which shows the value of y for corresponding values of x

y x
0 1
1 3
2 4
3 8

I want to fit a 2nd or 3rd order polynomial eg. y = a + bx + cx^2 + dx^3, where a, b, c, and d are lagrangian coefficients that I need to find. how can I find them?


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