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| author | Nguyễn Gia Phong <vn.mcsinyx@gmail.com> | 2020-02-16 14:26:55 +0700 |
|---|---|---|
| committer | Nguyễn Gia Phong <vn.mcsinyx@gmail.com> | 2020-02-16 14:26:55 +0700 |
| commit | 82e6cf7d1046d6cee16f7e8b044ec33e7ec6c4b7 (patch) | |
| tree | f7b7ae0bce69070c47a1b31a85bd2bc69dfecf09 /usth/MATH2.4/labwork/1/ratpoison.py | |
| parent | 29d1001e2e21eff289bff23412e284c8b2e44595 (diff) | |
| download | cp-82e6cf7d1046d6cee16f7e8b044ec33e7ec6c4b7.tar.gz | |
[usth] Numerical Method is MATH2.4
Diffstat (limited to 'usth/MATH2.4/labwork/1/ratpoison.py')
| -rw-r--r-- | usth/MATH2.4/labwork/1/ratpoison.py | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/usth/MATH2.4/labwork/1/ratpoison.py b/usth/MATH2.4/labwork/1/ratpoison.py new file mode 100644 index 0000000..16aa65d --- /dev/null +++ b/usth/MATH2.4/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 |