# Updating the qr factorization and the least squares problem Free adult porn live cams and chat no sign up

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I'm trying to understand how to solve a least squares problem of the form: $$\begin A& B \end\beginx\y\end = [b]$$ where I only explicitly solve for $y$ and not $x$.I have access to some c code which performs a QR factorization on $A$ and uses $Q_A$ on $B$ and $b$.The (co)variances of the shots have also been computed so that weights can be correctly assigned.

The least squares solution of this problem is usually computed by "the method of normal equations".Least squares is then applied to $\tilde$ and $\tilde$ to find $y$.Could someone please help me with a description of this method?This should make it easier for people who read this article to go to the actual literature.However it does make for some awkwardness in a few places.