Least squares problems have two types.
Linear least-squares solves min||C*x - d||2, possibly with bounds or linear constraints. See Linear Least Squares.
Nonlinear least-squares solves min(∑||F(xi) – yi||2), where F(xi) is a nonlinear function and yi is data. See Nonlinear Least Squares (Curve Fitting).
- Linear Least Squares
Solve linear least-squares problems with bounds or linear constraints
- Nonlinear Least Squares (Curve Fitting)
Solve nonlinear least-squares (curve-fitting) problems in serial or parallel