How to add a Sequence of Estimates to my Newton Raphson Code for matlab?

Question

My code works BUT I need to add 2 more things:

• output- a vector containing the sequence of estimates including the initial guess x0,

• input- max iterations

  function [ R, E ] = myNewton( f,df,x0,tol )
      i = 1;
  
      while abs(f(x0)) >= tol
          R(i) = x0;
          E(i) = abs(f(x0));
          i = i+1;
          x0 = x0 - f(x0)/df(x0);
      end
  
      if abs(f(x0)) < tol
          R(i) = x0;
          E(i) = abs(f(x0));
      end
  
  end 
  

Answer 1

well, everything you need is pretty much done already and you should be able to deal with it, btw..

1. max iteration is contained in the variable i, thus you need to return it; add this

    function [ R, E , i] = myNewton( f,df,x0,tol )
   

2. Plot sequence of estimates:

   plot(R); %after you call myNewton
   

3. display max number of iterations

   disp(i); %after you call myNewton