MPFIT uses the Levenberg-Marquardt technique to solve the least-squares problem. In its typical use, MPFIT will be used to fit a user-supplied function (the "model") to user-supplied data points (the "data") by adjusting a set of parameters. MPFIT is based upon MINPACK-1 (LMDIF.F) by More and collaborators

Markwardt IDL\mpfit.pro
.............\mpfitfun.pro
.............\tnmin.pro
Markwardt IDL

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