PETSc version 3.16.5
Fix/Edit manual page

# VecGetArray1dWrite

Returns a pointer to a 1d contiguous array that will contain this processor's portion of the vector data. You MUST call VecRestoreArray1dWrite() when you no longer need access to the array.

### Synopsis

    #include "petscvec.h"
    PetscErrorCode  VecGetArray1dWrite(Vec x,PetscInt m,PetscInt mstart,PetscScalar *a[])

Logically Collective

### Input Parameters

| x | - the vector
| m | - first dimension of two dimensional array
| mstart | - first index you will use in first coordinate direction (often 0)

### Output Parameter

| a | - location to put pointer to the array

### Notes

For a vector obtained from DMCreateLocalVector() mstart are likely obtained from the corner indices obtained from DMDAGetGhostCorners() while for DMCreateGlobalVector() they are the corner indices from DMDAGetCorners().

For standard PETSc vectors this is an inexpensive call; it does not copy the vector values.

### See Also

VecGetArray(), VecRestoreArray(), VecGetArrays(), VecGetArrayF90(), VecPlaceArray(),
VecRestoreArray2d(), DMDAVecGetArray(), DMDAVecRestoreArray(), VecGetArray3d(), VecRestoreArray3d(), VecGetArray2d(), VecRestoreArray1d(), VecGetArray4d(), VecRestoreArray4d()

### Level

developer

### Location

src/vec/vec/interface/rvector.c
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages