!
!
!   This program demonstrates use of MatGetRow() and MatGetRowMaxAbs() from Fortran
!
      program main
#include <petsc/finclude/petscmat.h>
      use petscmat
      implicit none

      Mat      A
      PetscErrorCode ierr
      PetscInt M,N
      PetscViewer   v
      Vec           rowmax
      PetscBool flg
      character*(256)  f

      PetscCallA(PetscInitialize(ierr))

      PetscCallA(PetscOptionsGetString(PETSC_NULL_OPTIONS,PETSC_NULL_CHARACTER,'-f',f,flg,ierr))
      PetscCallA(PetscViewerBinaryOpen(PETSC_COMM_WORLD,f,FILE_MODE_READ,v,ierr))

      PetscCallA(MatCreate(PETSC_COMM_WORLD,A,ierr))
      PetscCallA(MatSetType(A, MATSEQAIJ,ierr))
      PetscCallA(MatLoad(A,v,ierr))

      PetscCallA(MatView(A,PETSC_VIEWER_STDOUT_WORLD,ierr))

!
!     Test MatGetRowMaxAbs()
      PetscCallA(MatGetSize(A,M,N,ierr))
      PetscCallA(VecCreate(PETSC_COMM_WORLD,rowmax,ierr))
      PetscCallA(VecSetSizes(rowmax,M,M,ierr))
      PetscCallA(VecSetFromOptions(rowmax,ierr))

      PetscCallA(MatGetRowMaxAbs(A,rowmax,PETSC_NULL_INTEGER,ierr))
      PetscCallA(VecView(rowmax,PETSC_VIEWER_STDOUT_WORLD,ierr))

      PetscCallA(MatGetRowMax(A,rowmax,PETSC_NULL_INTEGER,ierr))
      PetscCallA(VecView(rowmax,PETSC_VIEWER_STDOUT_WORLD,ierr))

      PetscCallA(MatGetRowMinAbs(A,rowmax,PETSC_NULL_INTEGER,ierr))
      PetscCallA(VecView(rowmax,PETSC_VIEWER_STDOUT_WORLD,ierr))

      PetscCallA(MatGetRowMin(A,rowmax,PETSC_NULL_INTEGER,ierr))
      PetscCallA(VecView(rowmax,PETSC_VIEWER_STDOUT_WORLD,ierr))

      PetscCallA(MatDestroy(A,ierr))
      PetscCallA(PetscViewerDestroy(v,ierr))
      PetscCallA(VecDestroy(rowmax,ierr))

      PetscCallA(PetscFinalize(ierr))
      end

!/*TEST
!
!     test:
!       args: -f ${DATAFILESPATH}/matrices/tiny
!       requires: datafilespath double !complex !defined(PETSC_USE_64BIT_INDICES)
!
!TEST*/