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Fix default coeffs for the degenerate dimension case.

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Alex Shinn 2024-05-22 21:59:11 +09:00
parent 0d8e91e96c
commit 65589e3e26
1 changed files with 6 additions and 8 deletions
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14
lib/srfi/231/base.scm
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@ -416,16 +416,14 @@
(cond (cond
((< i 0) ((< i 0)
res) res)
((= (+ 1 (interval-lower-bound domain i))
(interval-upper-bound domain i))
;; (vector-set! res (+ i 1) (if (< (+ i 1) dim)
;; (interval-width domain (+ i 1))
;; 1))
(lp (- i 1) scale))
(else (else
(let ((coeff (* scale (- (interval-upper-bound domain i) (let* ((width (interval-width domain i))
(interval-lower-bound domain i))))) (coeff (* scale width)))
;; The coefficient for stepping over each element is the
;; volume (product of widths) of all higher dimensions.
(vector-set! res (+ i 1) scale) (vector-set! res (+ i 1) scale)
;; Offset the constant bias by the lower bound of this
;; dimension (typically but not necessarily 0).
(vector-set! res 0 (- (vector-ref res 0) (vector-set! res 0 (- (vector-ref res 0)
(* scale (interval-lower-bound domain i)))) (* scale (interval-lower-bound domain i))))
(lp (- i 1) coeff))))))) (lp (- i 1) coeff)))))))