petsc-3.9.4 2018-09-11
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TaoGetResidualNorm

 Gets the current value of the norm of the residual at this time.

Synopsis

#include "petsctao.h" 
PetscErrorCode  TaoGetResidualNorm(Tao tao,PetscReal *value)
Not Collective

Input Parameter

tao -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.

Keywords

Tao, nonlinear, get, iteration, number,

See Also

TaoGetLinearSolveIterations(), TaoGetIterationNumber(), TaoGetObjective()

Level

intermediate

Location

src/tao/interface/taosolver.c
Index of all Tao routines
Table of Contents for all manual pages
Index of all manual pages