TaoGetResidualNorm

Gets the current value of the norm of the residual (gradient) at this time.

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoGetResidualNorm(Tao tao, PetscReal *value)

Not Collective

Input Parameter

• tao - the Tao context

Output Parameter

• value - the current value

Developer Note

This is the 2-norm of the residual, we cannot use TaoGetGradientNorm() because that has a different meaning. For some reason Tao sometimes calls the gradient the residual.

See Also

TAO: Optimization Solvers, Tao, TaoGetLinearSolveIterations(), TaoGetIterationNumber(), TaoGetObjective()

Level

intermediate

Location

src/tao/interface/taosolver.c

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Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages