24 lines
546 B
Scheme
24 lines
546 B
Scheme
(require plot)
|
|
|
|
(define x-vals (build-list 15 (lambda (x) x) ))
|
|
(define errors (build-list 15 (lambda (x) 1)))
|
|
|
|
(define (fun x)
|
|
(* 3 (exp (* x -1 1.32))))
|
|
(define z-vals (map fun x-vals))
|
|
|
|
(define (gues-fun x a b)
|
|
(* a (exp (* x -1 b))))
|
|
|
|
(define params
|
|
(fit gues-fun
|
|
((a 1) (b 1))
|
|
(map vector x-vals z-vals errors)))
|
|
|
|
(plot (mix
|
|
(points (map vector x-vals z-vals))
|
|
(line (lambda (x)
|
|
(apply gues-fun x (fit-result-final-params params)))))
|
|
(x-min -1) (x-max 20)
|
|
(y-min -1) (y-max 10))
|