Solve a nonlinear least squares problem using a modified Levenberg-Marquardt algorithm and a user-supplied Jacobian. Classes : G1b1b . Unconstrained optimization of a smooth multivariate function, user provides first derivatives K1b1a2 . Unconstrained nonlinear least squares approximation by smooth functions, user provides first derivatives Type : Fortran subroutine in IMSLM library. Access : Proprietary. Many implementations available. Precision: Double. Usage : CALL DUNLSJ (FCN, JAC, M, N, XGUESS, XSCALE, FSCALE, IPARAM, RPARAM, X, FVEC, FJAC, LDFJAC) Details : Documentation Example Sites : (1) ITL
ITL: Unix Workstation Network, National Institute of Standards and Technology (NIST), Gaithersburg, MD. Available to NIST staff. Precision: Double. (Single: UNLSJ) Access available only to NIST staff on internal Unix systems. They may access this package provided the /itl tree is cross-mounted. Link : Login to spruce.nist.gov and see ITL How-To for information on how to setup your environment and link. Documentation: cat /home/fetch/Subjects/Math-Stat-Software/imsl/Documentation/dunlsj Example : cat /home/fetch/Subjects/Math-Stat-Software/imsl/Examples/dunlsj
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