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| author | Nguyễn Gia Phong <vn.mcsinyx@gmail.com> | 2019-12-16 21:31:18 +0700 |
|---|---|---|
| committer | Nguyễn Gia Phong <vn.mcsinyx@gmail.com> | 2019-12-16 21:31:18 +0700 |
| commit | e461df7573c2b7b7e26c965d8cf2d8e175d67378 (patch) | |
| tree | 193b8439edac52c1749764395fe5f7787889eda9 /usth/MATH2.2/labwork/1/ratpoison.py | |
| parent | c1008fe39217be7f91f0ea23483e747bfbc5743e (diff) | |
| download | cp-e461df7573c2b7b7e26c965d8cf2d8e175d67378.tar.gz | |
[usth/MATH2.2] Numerical Methods
The future starts now.
Diffstat (limited to 'usth/MATH2.2/labwork/1/ratpoison.py')
| -rw-r--r-- | usth/MATH2.2/labwork/1/ratpoison.py | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/usth/MATH2.2/labwork/1/ratpoison.py b/usth/MATH2.2/labwork/1/ratpoison.py new file mode 100644 index 0000000..16aa65d --- /dev/null +++ b/usth/MATH2.2/labwork/1/ratpoison.py @@ -0,0 +1,8 @@ +def ratpoison(f, df, x, es=10**-8, imax=20): + ea, i = 1, 0 + while ea > es and i < imax: + i += 1 + xold, x = x, x - f(x)/df(x) + if f(x) == 0: return x, 0, 0, i + if x: ea = abs((x - xold) / x) + return x, f(x), ea, i |