Numerical methods for linear least squares

Numerical methods for linear least squares entails the numerical analysis of linear least squares problems. == Introduction == A general approach to the least squares problem m i n ‖ y − X β ‖ 2 {\displaystyle \operatorname {\,min} \,{\big \|}\mathbf {y} -X{\boldsymbol {\beta }}{\big \|}^{2}} can be described as follows.