interpolate ( x ; y ; t ; 0 ; 0 )
Polynomial interpolation of arbitrary degree
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Function definition: (Copy & paste into FileMaker's Edit Custom Function window)
Custom function implementation of Neville's algorithm for polynomial interpolation; see http://en.wikipedia.org/wiki/Neville's_algorithm .
The degree of the interpolating polynomial is determined by the length of the lists x resp. y; if ValueCount(x)=n then the degree is n-1.
The sample output above therefore is the value of the third degree interpolating polynomial at t=3,24.
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