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how to obtain patial_der​ivative_ma​trix_linea​r_least_sq​uare ?

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Aidy
Aidy 2013-9-27
关闭： MATLAB Answer Bot 2021-8-20
Dear all,
When solving linear least squares in Matlab, can I get the matrix of partial derivatives numerically derived via Matlab, in a similar way to lsqnonlin ?
Aiden Jobe
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Matt J
Matt J 2013-9-27
编辑：Matt J 2013-9-27
"Get it" from what? If it is linear least squares, i.e., you are minimizing
f(x) = |A*x-b|^2
don't you have the matrix A already? For a linear problem, A itself would be the matrix of partial derivatives (of the residuals).

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