Problem:
Find the least squares vector given the matrix
$\left(
\begin{array}{cccc}
 -1 & -3 & 3 & 1 \\
 1 & -3 & -1 & -1 \\
 -1 & -2 & 3 & -3 \\
 -1 & 2 & 3 & -1 \\
 1 & 2 & 3 & -1 \\
 -1 & 3 & -3 & -2 \\
\end{array}
\right)$ and the vector
$\left(
\begin{array}{c}
 2.79 \\
 2.35 \\
 -2.87 \\
 0.64 \\
 2.44 \\
 1.22 \\
\end{array}
\right)$.
Answer:
$\left(
\begin{array}{c}
 0.521 \\
 0.068 \\
 0.142 \\
 0.173 \\
\end{array}
\right)$
{'source': 'AMPS', 'file': 'amps/mathematica/linear_algebra/least_squares/36880.txt'}