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 FileMaker Pro Custom Functions

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interpolate(x;y;t;0;0)

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Wilhelm Werner, n/a
n/a

Polynomial interpolation of arbitrary degree

Sample Input:
interpolate("1¶2¶4¶8";"1¶2¶3¶4"; 3,24;0;0)
Sample Output:
2,739370666666666667


 Then copy & paste into FileMaker Advanced's Edit Custom Function window.

Click here to copy To Clip Manager if you have myFMbutler's Clip Manager installed

Description:

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.

Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

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