TaoTestHessian

Compare the user-supplied Hessian with a finite-difference approximation, when requested via the options database, and print the difference.

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoTestHessian(Tao tao)

Collective

Input Parameter

• tao - the Tao context

Options Database Keys

• -tao_test_hessian threshold - enable the comparison, optionally overriding the reporting threshold (default 1e-5)

• -tao_test_hessian_view - display the user-supplied Hessian, the finite-difference Hessian, and their difference

Note

If -tao_test_hessian is not set, this routine returns immediately without performing any work.

See Also

TAO: Optimization Solvers, Tao, TaoTestGradient(), TaoComputeHessian()

Level

intermediate

Location

src/tao/interface/taosolver_hj.c

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Index of all Tao routines
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Index of all manual pages