petsc-3.5.4 2015-05-23

TaoGetHistory

Gets the array used to hold the convergence history.

Synopsis

#include "petsctao.h" 
PetscErrorCode TaoGetHistory(Tao tao, PetscReal **obj, PetscReal **resid, PetscReal **cnorm, PetscInt *nhist)

Collective on Tao

Input Parameter

tao -the Tao context

Output Parameters

	obj	- array used to hold objective value history
	resid	- array used to hold residual history
	cnorm	- array used to hold constraint violation history
	nhist	- size of obj, resid, and cnorm (will be less than or equal to na given in TaoSetHistory)

Notes

The calling sequence for this routine in Fortran is

  call TaoGetHistory(Tao tao, integer nhist, integer info)

This routine is useful, e.g., when running a code for purposes of accurate performance monitoring, when no I/O should be done during the section of code that is being timed.

Examples