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- ; CFIT2.EKA
- ;
- ; version 1.0
- ; August 10, 1987
- ; Copyright (c) 1987 Namir Clement Shammas
- ;
- ; Least-square fitting between three or more variables
- ;
- ; general model is:
- ;
- ; f(x1,...,xn) = a0 + a1 f1(x1,...,xn) + a2 + f2(x1,...,xn) +
- ; an fn(x1,...,xn)
- ;
- ; examples:
- ;
- ; Simple models: no cross-product terms
- ; -------------------------------------
- ;
- ; f(x1,x2) = a0 + a1 * x1 + a2 * x2
- ; f(x1,x2,x3) = a0 + a1 * x1 + a2 * x2 + a3 * x3
- ; f(x1,x2) = a0 + a1 * Ln(x1) + a2 * sqrt(x2)
- ; f(x1,x2,x3) = a0 + a1 * x1^2 + a2 * x2 + a3 * Ln(x3)
- ;
- ; Advanced models: with cross-product terms
- ; -----------------------------------------
- ;
- ; 3-D surface
- ; f(x1,x2) = a0 + a1 * x1 + a2 + x1^2 + b1 * x2 + b2 * x2^2 + c1
- ;
- ; f(x1,x2,x3) = a0 + a1 * x1 * sqrt(x2) + a2 * Ln(x2) * x3^2
-
- $ substlevel = 0
-
- ; state selected model here
- f(x1,x2) = a0 + a1 * x1 + a2 * x1^2 + b1 * x2 + b2 * x2^2
-
- f(1,1) = 11
- f(1,2) = 17
- f(1,3) = 27
- f(1,4) = 41
- f(2,1) = 7
- f(2,2) = 14
- f(2,3) = 25
- f(2,4) = 40
- f(3,1) = -1
- f(3,2) = 7
- f(3,3) = 19
- f(3,4) = 35
- f(4,1) = -13
- f(4,2) = -4
- f(4,3) = 9
- f(4,4) = 26
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