KSPGetResidualHistory

Gets the array used to hold the residual history and the number of residuals it contains.

#include "petscksp.h" 
int KSPGetResidualHistory(KSP ksp,PetscReal **a,int *na)

Not Collective

ksp -iterative context obtained from KSPCreate()

	a	- pointer to array to hold history (or PETSC_NULL)
	na	- number of used entries in a (or PETSC_NULL)

Can only be called after a KSPSetResidualHistory() otherwise a and na are set to zero

The Fortran version of this routine has a calling sequence

  call KSPGetResidualHistory(KSP ksp, integer na, integer ierr)

KSP, get, residual, history, norm