Least squares
lastmod 2022-07-12created 2022-07-121 edits
The method of least squares, or least squares approximation, is a method for approximately finding the solution equation of a system: it finds the solution that minimizes the sum of the squares (SS) of the errors between the approximate solution and the actual solution.
This method is useful when values cannot be measured exactly, and is used in particular to estimate the constants of an equation when the form of the system's equation is known.