Trust Region Optimization for Nonlinear Functions with Sparse Hessians R package trustOptim version 0.8.7.4 CRAN Task View: Optimization (https://CRAN.R-project.org/view=Optimization) Trust region algorithm for nonlinear optimization. Efficient when the Hessian of the objective function is sparse (i.e., relatively few nonzero cross-partial derivatives). See Braun, M. (2014) <doi:10.18637/jss.v060.i04>. Software Depends: R (>= 3.6) Imports: Matrix (>= 1.2.18), Rcpp (>= 1.0.3), methods LinkingTo: Rcpp, RcppEigen (>= 0.3.3.7.0) Suggests: testthat, knitr Michael Braun <braunm@smu.edu> Comprehensive R Archive Network (CRAN) Michael Braun [aut, cre, cph] (ORCID: <https://orcid.org/0000-0003-4774-2119>) MPL (>= 2.0) 2026-01-13 application/tgz https://CRAN.R-project.org/package=trustOptim doi:10.32614/CRAN.package.trustOptim