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Least squared matrix error

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Cesar Cardenas
Cesar Cardenas 2022-8-28
关闭: John D'Errico 2022-8-28
is this a right approach to calculate the least squared error x* to this problem? this is what I'm getting:
Warning: Matrix is close to singular or badly scaled. Results may be inaccurate. RCOND = 6.291272e-19.
> In P2 (line 7)
x =
0.5510
0.0408
Any help will be greatly appreciated
A = [1 2; 3 4; 5 6; 7 8; 9 0]
b = [1; 2; 3; 4; 5]
A'*inv(A*A');
x = lsqr(A,b)

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