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4-Least Squares重点

4.1 LEAST SQUARES AND THE NORMAL EQUATIONS

4.1.1 Inconsistent systems of equations

概念1 image1

概念2 没有解的方程组称为inconsistent。

概念3 image2

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4.2.2 Data linearization

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4.3 QR FACTORIZATION

4.3.1 Gram–Schmidt orthogonalization and least squares

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full QR factorization:补成方阵 image7

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4.3.3 Householder reflectors

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4.5 NONLINEAR LEAST SQUARES