Реализовать метод Гаусса для вычисления матрицы и вектора

A=[1 2 3; -2 2 4; 1 1 3];   
b=[6; 4; 5];
n = length(A);
 
for k=1:(n-1)
    for j=(k+1):n
        n(1i,k)=-A(1i,k)/A(k,k);
        for j=(k+1):n
            A(1i,j)=N(1i,k)*A(k,j)+A(1i,j);
            b(1i)=N(1i,k)*b(k)+b(1i);
        end
    end
    A(k+1):n;k=0;
end

A=[1 2 3; -2 2 4; 1 1 3];   
b=[6; 4; 5];
n = length(A);
 
for k=1:(n-1)
    for j=(k+1):n
        n(i,k)=-A(i,k)/A(k,k);
        for j=(k+1):n
            A(i,j)=N(i,k)*A(k,j)+A(i,j);
            b(i)=N(i,k)*b(k)+b(i);
        end
    end
    A(k+1):n;k=0;
end

C=[A,b];
[m,n]=size(C);
for k=1:m-1
    p=C(k,k)./C(k+1:m,k);
    P=repmat(p,1,n-k+1);
    C(k+1:m,k:n)=repmat(C(k,k:n),m-k,1)-P.*C(k+1:m,k:n);
end
X(m)=C(m,n)/C(m,n-1);
for k=m-1:-1:1
    C(1:k,k+1)=C(1:k,k+2)-X(k+1)*C(1:k,k+1);
    X(k)=C(k,k+1)/C(k,k);
end
X=X'

C=[A,b];
[m,n]=size(C);
for k=1:m-1
    p=C(k,k)./C(k+1:m,k);
    C(k+1:m,k:n)=C(k,k:n)-p.*C(k+1:m,k:n);
end
X(m)=C(m,n)/C(m,n-1);
for k=m-1:-1:1
    C(1:k,k+1)=C(1:k,k+2)-X(k+1)*C(1:k,k+1);
    X(k)=C(k,k+1)/C(k,k);
end
X=X'

A=[1 2 3; -2 2 4; 1 1 3];   
b=[6; 4; 5];
C=[A,b];
[m,n]=size(C);
for k=1:m-1
    p=C(k,k)./C(k+1:m,k);
    P=repmat(p,1,n-k+1);
    C(k+1:m,k:n)=repmat(C(k,k:n),m-k,1)-P.*C(k+1:m,k:n);
end
X(m)=C(m,n)/C(m,n-1);
for k=m-1:-1:1
    C(1:k,k+1)=C(1:k,k+2)-X(k+1)*C(1:k,k+1);
    X(k)=C(k,k+1)/C(k,k);
end
X=X'