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| author | Elizabeth Hunt <elizabeth.hunt@simponic.xyz> | 2023-10-11 10:04:04 -0600 |
|---|---|---|
| committer | Elizabeth Hunt <elizabeth.hunt@simponic.xyz> | 2023-10-11 10:04:04 -0600 |
| commit | 43f06890e2689af2ef54c4480fe5790692a24f65 (patch) | |
| tree | b933f3e05aad81d780c0c94646676efa1bbad22d /src/approx,derivative.lisp | |
| parent | a74a732b27fb610133190e89a91b2d42d0cf78b3 (diff) | |
| download | cmath-43f06890e2689af2ef54c4480fe5790692a24f65.tar.gz cmath-43f06890e2689af2ef54c4480fe5790692a24f65.zip | |
deprecate common lisp solutions and write c; it's too much effort to keep up with the requirements for an archive.
Diffstat (limited to 'src/approx,derivative.lisp')
| -rw-r--r-- | src/approx,derivative.lisp | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/src/approx,derivative.lisp b/src/approx,derivative.lisp deleted file mode 100644 index 631a5c0..0000000 --- a/src/approx,derivative.lisp +++ /dev/null @@ -1,25 +0,0 @@ -(in-package :lizfcm.approx) - -(defun central-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)))) - -(defun forward-derivative-at (f x &optional (delta 0.01)) - (let* ((x2 (+ x delta)) - (x1 x) - (y2 (apply f (list x2))) - (y1 (apply f (list x1)))) - (/ (- y2 y1) - (- x2 x1)))) - -(defun backward-derivative-at (f x &optional (delta 0.01)) - (let* ((x2 x) - (x1 (- x delta)) - (y2 (apply f (list x2))) - (y1 (apply f (list x1)))) - (/ (- y2 y1) - (- x2 x1)))) |