modified newton's method

14 次查看（过去 30 天）
Robin
Robin 2011-11-30
I am new to matlab. How do apply a formula to an equation? EX. formula: x(sub n)=x(sub n-1) - m (f(xsub n-1)/ f'(xsub n-1) to eqn f(x) = x^3 -3x^2 + 4 = 0

请先登录，再回答此问题。

回答（1 个）

bym
bym 2011-12-1
one way is to use anonymous functions:
f = @(x) x^3-3*x^2+4;
fprime = @(x) 3*x^2-6*x;
then use a for loop to perform the iteration
x = zeros(10,1);
x(1)=.1
for i = 1:9
x(i+1) = x(i)-f(x(i))./fprime(x(i));
end

类别

在 Help Center 和 File Exchange 中查找有关 Problem-Based Optimization Setup 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by