- #1

megr_ftw

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**Fixed Point iteration using matlab, whats wrong with my code??**

## Homework Statement

We are suppose to use MatLab to make a program using the fixed point iteration to find the root of an equation.

I just can't figure out what I'm doing wrong here...

I'm pretty sure a while loop is the appropriate measure to use, but how should I go about plugging in g(x) which is the modified form of the original equation..

## Homework Equations

## The Attempt at a Solution

%finds the approximate root using fixed point iteration

%input: inline function g(x)

%guess point x0

%max error (err_max)

%number of iterations (n)

%output: x is the approx. root

%k is the number of iterations carried out

function root= fixed_point(g,x0,n,err_max)

i=1;

x(1)=g(x0);

while i<=n

x(i+1)=g(x(i));

if abs((x(i+1)-x(i))/(x(i+1)) < err_max

disp('Converges after k iterations')

k=i;

disp('The root to the equation is')

x(i+1)

return

end

i=i+1;

end