error message how to solve !?

hey

i keep getting this error:

"Undefined function 'NR' for input

arguments of type 'function_handle'."

the NR function is a function that i built in order to apply the newton raphson method.

this is the function code :

function [res,k]=NR(x0,tol,f,f_prime,max_iter)

X_k=x0;

X_k_val=f(x0);

i=2;

while abs(X_k_val(i-1))>tol && i<max_iter

X_k(i)= X_k(i-1) - f(X_k(i-1)) / f_prime(X_k(i-1));

X_k_val(i)=f(X_k(i));

i=i+1;

end

our_sol = X_k(length(X_k));

res=table([1:i-1]',X_k',X_k_val',abs(X_k - our_sol)','VariableNames',{'Iteration','X','f_X','|X_k - x*|'});

k = 1:i-1;

%iter_val = f(X_k(k));

end

Answer 1

[Daniel Pollard]

The error message is exactly what it says. You defined a function, which is not defined if one of your inputs is a function handle.

https://www.mathworks.com/help/matlab/matlab_prog/pass-a-function-to-another-function.html

To pass a function into another function, use the @ notation.