My text book gives matlab codes to copy directly, but Im trying to run a Jacobi iteration and it keeps telling me that there are not enough inputs. I have copied them from the textbook verbatin, please help me! I dont know why Im getting an error

function x = Jacobi(A,b,x0,tol,maxit)

[n, m] = size(A);

xold = x0;

C = -A;

for i = 1:n

      C(i,i) = 0;
  end
  for i = 1:n
      C(i,:) = C(i,:)/A(i,i);
  end
  for i = 1:n
      d(i,1) = b(i)/A(i,i);
  end
  i = 1 ;
  disp('    i     x1     x2     x3     ....');
  while (i <= maxit)
      xnew = C * xold + d;
      if norm(xnew-xold) <= tol
          x = xnew;
          disp('Jacobi method converged'); return;
      else 
          xold = xnew;
      end 
      disp(['i    xnew']);
      i = i + 1;
  end
  disp('Jacobi mmethod did not converge');
  disp('results after maximum number of iterations');
  x = xnew;

[dpb]

You didn't supply the most key piece of information; namely the line that error'ed and the error message in context with the line. Don't paraphrase; don't retype; cut 'n paste.

Also, don't put the question in the title; make the title exactly that and that alone; save the actual question for the body.

[Star Strider]

You left out an important part of the information.

What line is throwing the error? Copy all the red text from the Command Window and paste it in a Comment here.

How are you calling Jacobi in your main script?