Problem:
Find the least squares vector given the matrix
$\left(
\begin{array}{cccc}
 -1 & -2 & -1 & 3 \\
 -2 & 0 & -1 & 0 \\
 1 & 0 & 0 & 2 \\
 -2 & 1 & 2 & -3 \\
 -1 & 3 & 3 & 3 \\
\end{array}
\right)$ and the vector
$\left(
\begin{array}{c}
 -0.48 \\
 0.86 \\
 -0.37 \\
 -1.69 \\
 -0.21 \\
\end{array}
\right)$.
Answer:
$\left(
\begin{array}{c}
 0.025 \\
 0.89 \\
 -1.057 \\
 0.071 \\
\end{array}
\right)$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/least_squares/15577.txt'}