Hi. I have been asked to iterate a function 100 times with an initial guess of x=4, but i am unsure how to go around it. I have been given the following function:

function y=function_for_Ex6a(x)

for x=(127.0526);

y=4*(1-cos(x)).^2+x.^3;

end

[John D'Errico]

Why do you think you need to use a for loop, just to define the variable x=127.0526? Where does 127.0256 come from anyway?

You do apparently want to loop 100 times, so you would want to use a for loop.

But what is the purpose of the iteration? Is this an iteration to solve for y==0, so a root finding problem? What iteration were you told to do? A fixed point iteration, perhaps? Or is this just an iteration where you plug the output, y, back into the function? In that case, it will very rapidly diverge to infinity.

[Alex Mcaulley]

Give more information. What do you want to do whit this loop? Your function now is overwriting the value of x and it is just doing one iteration with x = 127.0526

[Sam Thorpe]

the question is very vague. it just asks for us to iterate the function 100 times. i shall try and get some more clarity.