sparseLM: Interface to the 'sparseLM' Levenberg-Marquardt Library

Provides an R interface to the 'sparseLM' C library for large-scale nonlinear least squares problems with arbitrarily sparse Jacobians. The underlying solver implements a sparse variant of the Levenberg-Marquardt algorithm for minimizing sum-of-squares objective functions, supports user-supplied analytic Jacobians or finite-difference approximation, and is designed to exploit sparsity for improved memory use and performance. This package exposes the solver in R and uses sparse matrix classes and the 'CHOLMOD' sparse Cholesky factorization routines through the 'Matrix' package interface. Methods from the C library are described in Lourakis (2010) <doi:10.1007/978-3-642-15552-9_4>.

Version:	0.5
Depends:	Matrix
Imports:	methods
LinkingTo:	Matrix
Published:	2026-03-30
DOI:	10.32614/CRAN.package.sparseLM
Author:	Colin Smith [aut, cre], Manolis Lourakis [aut]
Maintainer:	Colin Smith <colin.smith at wesleyan.edu>
License:	GPL-2
URL:	https://github.com/smith-group/sparseLM, https://smith-group.github.io/sparseLM/
NeedsCompilation:	yes
Citation:	sparseLM citation info
Materials:	README
CRAN checks:	sparseLM results

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