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NL-FIT: A microcomputer program for non-linear fitting

✍ Scribed by G Sacchi Landriani; V Guardabasso; M Rocchetti


Publisher
Elsevier Science
Year
1983
Weight
463 KB
Volume
16
Category
Article
ISSN
0010-468X

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✦ Synopsis


A program for a microcomputer (HP 85) has been written using BASIC language. Given the analytical form of a model y: R ---* R the program computes the optimal parameters for non-linear least-squares fitting and gives information for its statistical evaluation. The program uses the Gauss-Newton algorithm with Marquardt's modification and other tricks. During the run a message is displayed if there is a high correlation between one or more couples of parameters to establish an interactive dialogue with the user on critical problems. The authors' aim was to make the program sufficiently quick and easy to use, efficient for a wide class of models and robust enough to deal with bad starting parameters.

Gauss-Newton method

Microcomputers Non-linear fitting


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