- #1
abajaj2280
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Homework Statement
Consider the vector a as an n × 1 matrix.
A) Write out its reduced QR factorization, showing the matrices [itex]\hat{Q}[/itex] and [itex]\hat{R}[/itex] explicitly.
B) What is the solution to the linear least squares problem ax ≃ b where b is a given n-vector.
Homework Equations
I was using the equation from 1.1 (http://www.math.ucla.edu/~yanovsky/Teaching/Math151B/handouts/GramSchmidt.pdf) to help me solve this problem.
The Attempt at a Solution
I haven't taken linear algebra for about 2 years and this is kind of hazy. I'm really confused here, and I really don't know where to start. I know that I'm supposed to come to this website with some sort of progress, but I'm really confused here.