petsc-3.7.3 2016-07-24
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# PetscViewerGetSubViewer

Creates a new PetscViewer (same type as the old) that lives on a subcommunicator

### Synopsis

    #include "petscviewer.h"
    PetscErrorCode  PetscViewerGetSubViewer(PetscViewer viewer,MPI_Comm comm,PetscViewer *outviewer)

Collective on PetscViewer

### Input Parameter

viewer -the PetscViewer to be reproduced

### Output Parameter

outviewer -new PetscViewer

Notes: Call PetscViewerRestoreSubViewer() to return this PetscViewer, NOT PetscViewerDestroy()

This is most commonly used to view a sequential object that is part of a parallel object. For example block Jacobi PC view could use this to obtain a PetscViewer that is used with the sequential KSP on one block of the preconditioner.

### See Also

PetscViewerSocketOpen(), PetscViewerASCIIOpen(), PetscViewerDrawOpen(), PetscViewerRestoreSubViewer()

Level:advanced
Location: src/sys/classes/viewer/interface/dupl.c
Index of all Viewer routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

src/sys/examples/tutorials/ex15.c.html