Least squared matrix error

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Cesar Cardenas 2022 年 8 月 28 日

閉鎖済み: John D'Errico 2022 年 8 月 28 日

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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