Jacobi Iterations Coding Question

Question

Kaylene Widdoes 2015-10-6

0
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https://ww2.mathworks.cn/matlabcentral/answers/247157-jacobi-iterations-coding-question

回答： Walter Roberson 2015-10-6

Here's what I have so far with my code. It says that the function file is not available in this context. I am wondering what I have to put where as far as different function files and what not to make it run. Any help is appreciated.

% HW 3 - Problem 2
A=[4 1 -1; 1 -5 -1;  2 -1 -6];
B=[13 -8 -2];
P=[0,0,0];
delta=(1*(10^(-10)));
max1=10;
counter = 0;
function X=jacobi(A,B,P,delta, max1)
for k=1:max1
    for j=1:N
        X(j)=(B(j)-A(j,[1:j-1,j+1:N])*P([1:j-1,j+1:N]))/A(j:j);
        counter = counter + 1;
    end
      err=abs(norm(X'-P));
      relerr=err/(norm(X)+eps);
      p=X';
          if (err<delta)|(relerr<delta)
          break
      end
  end
X=X'