In matlab grader it says i am trying to write a scrip instead of a function.

f = @(x) (2.*x.^3 + 3.*x-1) .* cos(x) - x;
[bisec_root, n, err] = bisection_method(f, -1, 1, 10E-5, 20)
matlab_root = fzero(f, 1)
x1 = -1: 0.1: 1;
y1 = f(x1);
plot(x1, y1);
function [c, n, err] = bisection_method(f, a, b, tol, N)
c = a;
n = 1;
err = 1;
while err > tol && n < N
x = (a+b)/2;
err = abs(x - c);
if f(a)/f(x) < 0 %get the sign
b = x;
else
a = x;
end
c = x;
n = n + 1;
end
% Output
% bisec_root = 0.43854
% n = 16
% err = 6.1035e-05
% matlab_root = 0.43857

[Walter Roberson]

For the first part cut out everything before the function line

[Juan Gomez]

If I move everything below the function line it produces no output. It works on matlab but not matlab grader.

[Walter Roberson]

I did not say to move those lines below the function line: I said to delete them. You are required to submit a function, not a script.

[Juan Gomez]

I deleated the lines and matlab grader still says im trying to write a script.

[Adam Danz]

The first non-commented line of your code needs to be,

function [c, n, err] = bisection_method(f, a, b, tol, N)

If this isn't clear, spend some time reading through this page,

https://www.mathworks.com/help/matlab/matlab_prog/create-functions-in-files.html

Answer 1

[Cris LaPierre]

The "Solution script not found" sounds like an issue discovered in an update that was rolled out on the 13th. That issue has been addressed. Do you still see this error?