modified newton's method

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

Answer 1

[bym]

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