creating a function to solve non linear equations using simple iteration method

Create a Matlab function named (solveIteration) for solving a non-linear equation using (Simple iteration method) and takes the following inputs: g: function, x0 initial guess TolX as Termination tolerance on the function value, a positive scalar (when to stop iteration) and Maxiter as the max number of iterations if reached means the function has no solution The function returns the following outputs : x as a root(s) of the equation ,error as error message if the equation has no solutions Function seems like below one: function [x,error] = solveIteration(g,x0,TolX,MaxIter) ...

any hints ??

[Geoff]

You need to try and make a start, and when you get utterly stuck then post your code along with the problem you are having. If you want to learn to write code, you need to make an effort first.

[mark]

trying .. i just need the first steps as in the direction i need to get starting .. im new to matlap

[mark]

function [x,err] = solveit(g,x0,to,max)

syms x

x1=x0(1);

while subs(diff(g),x,x0)<=1

n=n+1;

if x1-subs(g,x,x1)<= to && n<= max

x1=subs(g,x,x1);

x=x1;

break

else

x=err;

end

end

end

Answer 1

[Sean de Wolski]

doc fsolve

If you have the Optimization Toolbox.

Answer 2

[Hafsa]

n = 3;

a = rand(n, n);

b = rand(n, 1);

% solve a * x + exp(x) = b for x

x = zeros(n, 1);

for itr = 1: 10

x = x - (a + diag(exp(x))) \ (a * x + exp(x) - b);

end