Approximate the Hessian using forward differences and a user-supplied gradient. Classes : G4f . Other service routines for optimization Type : Fortran subroutine in IMSLM library. Access : Proprietary. Many implementations available. Precision: Double. Usage : CALL DGDHES (GRAD, N, XC, XSCALE, GC, EPSFCN, H, LDH) 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: GDHES) 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/dgdhes Example : cat /home/fetch/Subjects/Math-Stat-Software/imsl/Examples/dgdhes
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