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Results tagged with linear-algebra
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user 10043
Questions about the properties of vector spaces and linear transformations, including linear systems in general.
1
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Making MATLAB svd robust to transpose operation
In Matlab, there is a sign ambiguity (i.e. $\pm1$). In LAPACK, it is worse, the ambiguity is $e^{i \phi}$, which Matlab removes later on.
Maybe you can take each vector of $U$ individual, find the co …
1
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2
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Inequality-constrained linear-regression, what is the covariance of the estimator?
If you do a linear regression: $||Ax - e ||^2$, where e is iid Gaussian, mean 0 and variance 1, then your answer is $x_{hat} = (A' A)^{-1} (A' * e)$ and the covariance of $x_{hat}$ is $(A' A)^{-1}$
N …