petsc-3.4.2 2013-07-02

# PetscOptionsGetViewer

Gets a viewer appropriate for the type indicated by the user

### Synopsis

    #include "petscviewer.h"
    PetscErrorCode  PetscOptionsGetViewer(MPI_Comm comm,const char pre[],const char name[],PetscViewer *viewer,PetscViewerFormat *format,PetscBool  *set)

Collective on MPI_Comm

### Input Parameters

| comm | - the communicator to own the viewer
| pre | - the string to prepend to the name or NULL
| name | - the option one is seeking

### Output Parameter

| viewer | - the viewer
| format | - the PetscViewerFormat requested by the user
| set | - PETSC_TRUE if found, else PETSC_FALSE

Notes: If no value is provided ascii:stdout is used

          ascii[:[filename][:[format][:append]]]   defaults to stdout - format can be one of ascii_info, ascii_info_detail, or ascii_matlab, for example ascii::ascii_info prints just the info

                                        about the object to standard out - unless :append is given filename opens in write mode

          binary[:[filename][:[format][:append]]]   defaults to binaryoutput

          draw

          socket[:port]                  defaults to the standard output port

          ams[:communicatorname]         publishes object to the AMS (Argonne Memory Snooper)

Use PetscViewerDestroy() after using the viewer, otherwise a memory leak will occur

### See Also

PetscOptionsGetReal(), PetscOptionsHasName(), PetscOptionsGetString(),
PetscOptionsGetIntArray(), PetscOptionsGetRealArray(), PetscOptionsBool() PetscOptionsInt(), PetscOptionsString(), PetscOptionsReal(), PetscOptionsBool(), PetscOptionsName(), PetscOptionsBegin(), PetscOptionsEnd(), PetscOptionsHead(), PetscOptionsStringArray(),PetscOptionsRealArray(), PetscOptionsScalar(), PetscOptionsBoolGroupBegin(), PetscOptionsBoolGroup(), PetscOptionsBoolGroupEnd(), PetscOptionsList(), PetscOptionsEList()

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

### Examples

src/sys/classes/viewer/examples/tutorials/ex2.c.html