PetscViewerASCIIOpen#

Opens an ASCII file for writing as a PETSCVIEWERASCII PetscViewer.

Synopsis#

#include "petscviewer.h"   
PetscErrorCode PetscViewerASCIIOpen(MPI_Comm comm, const char name[], PetscViewer *lab)

Collective

Input Parameters#

  • comm - the communicator

  • name - the file name

Output Parameter#

Notes#

To open a ASCII file as a viewer for reading one must use the sequence

This PetscViewer can be destroyed with PetscViewerDestroy().

The MPI communicator used here must match that used by the object one is viewing. For example if the Mat was created with a PETSC_COMM_WORLD, then the Viewer must be created with PETSC_COMM_WORLD

As shown below, PetscViewerASCIIOpen() is useful in conjunction with MatView() and VecView()

     PetscViewerASCIIOpen(PETSC_COMM_WORLD,"mat.output",&viewer);
     MatView(matrix,viewer);

See Also#

Viewers: Looking at PETSc Objects, MatView(), VecView(), PetscViewerDestroy(), PetscViewerBinaryOpen(), PetscViewerASCIIRead(), PETSCVIEWERASCII PetscViewerASCIIGetPointer(), PetscViewerPushFormat(), PETSC_VIEWER_STDOUT_, PETSC_VIEWER_STDERR_, PETSC_VIEWER_STDOUT_WORLD, PETSC_VIEWER_STDOUT_SELF,

Level#

beginner

Location#

src/sys/classes/viewer/impls/ascii/vcreatea.c

Examples#

src/snes/tutorials/ex48.c
src/ts/tutorials/ex9.c
src/ts/tutorials/ex14.c
src/snes/tutorials/ex15.c
src/snes/tutorials/ex1f.F90
src/ksp/ksp/tutorials/ex76.c
src/ksp/ksp/tutorials/ex56.c
src/ksp/ksp/tutorials/ex54.c
src/ksp/ksp/tutorials/ex72.c
src/snes/tutorials/ex70.c


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