diff options
Diffstat (limited to 'cl/src/approx/derivative.lisp')
| -rw-r--r-- | cl/src/approx/derivative.lisp | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/cl/src/approx/derivative.lisp b/cl/src/approx/derivative.lisp deleted file mode 100644 index 02fcb4c..0000000 --- a/cl/src/approx/derivative.lisp +++ /dev/null @@ -1,9 +0,0 @@ -(in-package :lizfcm.approx) - -(defun derivative-at (f x &optional (delta 0.01)) - (let* ((x2 (+ x delta)) - (x1 (- x delta)) - (y2 (apply f (list x2))) - (y1 (apply f (list x1)))) - (/ (- y2 y1) - (- x2 x1)))) |