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

27 Sep 2013
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Updated 20 Aug 2021
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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 on 27 Sep 2013
Edited: Matt J on 27 Sep 2013
"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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Aidy
Aidy
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