problems using newtons method

 x = -2;
Tol = 0.0000001;
count = 0;
dx=1;   
f=-13;    
fprintf('step      x           dx           f(x)\n')
fprintf('----  -----------  ---------    ----------\n')
fprintf('%3i %12.8f %12.8f %12.8f\n',count,x,dx,f)
xVec=x;fVec=f;
while (dx > Tol || abs(f)>Tol)  
    count = count + 1;
    fprime = cosx-x;
    xnew = x - (f/fprime);   
    dx=abs(x-xnew);          
    x = xnew;
    f = cosx-x;       
    fprintf('%3i %12.8f %12.8f %12.8f\n',count,x,dx,f)
end

this is what i was have. how can i fix this?

Answer 1

[Walter Roberson]

You could define cox and cost