Least-squares function approximation: Difference between revisions

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In [[mathematics]], '''least squares function approximation''' applies the principle of [[least squares]] to [[function approximation]], by means of a weighted sum of other functions. The best approximation can be defined as that which minimises the difference between the original function and the approximation; for a least-squares approach the quality of the approximation is measured in terms of the squared differences between the twothethree.

==Functional analysis==