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LMFIT(7) lmfit manual LMFIT(7) NAME lmfit - Levenberg-Marquardt least-squares minimization DESCRIPTION lmfit is a C library for Levenberg-Marquardt least-squares minimization and curve fitting. It is mature code, based on decades-old algorithms from the FORTRAN library MINPACK. For fitting a data set {(x_i,y_i)|i=0,1,..} by a parametric curve f(x,t), see lmcurve(3). For fitting a data set {(x_i,y_i+-dy_i)|i=0,1,..} by a parametric curve f(x,t), see lmcurve2(3). For generic minimization of the Eucledian norm of parametric vector, see lmmin2(3). For the simpler legacy API without error estimates, see lmmin(3). For an example how to use lmmin, see the source files lmcurve.h and lm- curve.c. Do not patch these files; copy and modify them to create your own, differently named version of lmcurve_data_struct, lmcurve_evaluate, and lm- curve. For an example how to use lmmin2 for weighted data, see the source files lmcurve2.h and lmcurve2.c. Do not patch these files; copy and modify them to create your own, differently named version of lmcurve2_data_struct, lm- curve2_evaluate, and lmcurve2. COPYING Copyright (C): 1980-1999 University of Chicago 2004-2015 Joachim Wuttke, Forschungszentrum Juelich GmbH Software: FreeBSD License Documentation: Creative Commons Attribution Share Alike SEE ALSO lmcurve(3), lmcurve2(3), lmmin(3), lmmin2(3) Homepage: https://jugit.fz-juelich.de/mlz/lmfit BUGS Please send bug reports and suggestions to the author <j.wut- tke@fz-juelich.de>. perl v5.42.2 2025-09-17 LMFIT(7)
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