PetscViewerASCIIOpen#

Opens an ASCII file for writing as a 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#

  • lab - the PetscViewer to use with the specified file

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/ksp/ksp/tutorials/ex54.c.html
src/ksp/ksp/tutorials/ex55.c.html
src/ksp/ksp/tutorials/ex56.c.html
src/ksp/ksp/tutorials/ex72.c.html
src/snes/tutorials/ex15.c.html
src/snes/tutorials/ex1f.F90.html
src/snes/tutorials/ex48.c.html
src/snes/tutorials/ex70.c.html
src/ts/tutorials/ex14.c.html
src/ts/tutorials/ex9.c.html


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Index of all Viewer routines
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Index of all manual pages