How to Implement Newton-Raphsons Method in Matlab?

[Dukefool]

My objective is to create an applicator for the Matlab Newton-Raphsons method using only a function handle, the initial value and the number of iterations desired. I'm extremely new to Matlab and programming so bare with me for being programming deficient. My question is when making a loop, how can you take the value made from x₁ onto x₂? For example if I wanted to approximate x²-5 with 6 iterations at the initial value of 100, how would I be able to take the value from x₅ onto x₆?

Here's what I have right now. I know it is absolutely wrong.
function y = myNewton(f,a,n)
syms x
x(0)=a;
df=diff(f(x),n);
for i=1:n
x=x(i-1)-f(x(i-1))/diff(f(x),i-1)
end
y=x

 

[Vailanor]

;end The correct code should look like this: function y = myNewton(f,a,n)x(1) = a;for i=2:n+1x(i)=x(i-1)-f(x(i-1))/diff(f(x(i-1)));endy = x(n+1);end