VecGetArray

 Returns a pointer to a contiguous array that contains this processor's portion of the vector data. For the standard PETSc vectors, VecGetArray() returns a pointer to the local data array and does not use any copies. If the underlying vector data is not stored in a contiquous array this routine will copy the data to a contiquous array and return a pointer to that. You MUST call VecRestoreArray() when you no longer need access to the array.

Synopsis

#include "petscvec.h" 
int VecGetArray(Vec x,PetscScalar *a[])
Not Collective

Input Parameter

x -the vector

Output Parameter

a -location to put pointer to the array

Fortran Note

This routine is used differently from Fortran 77 
   Vec         x

   PetscScalar x_array(1)

   PetscOffset i_x

   int         ierr

      call VecGetArray(x,x_array,i_x,ierr)



  Access first local entry in vector with



     value = x_array(i_x + 1)





     ...... other code



      call VecRestoreArray(x,x_array,i_x,ierr)


For Fortran 90 see VecGetArrayF90()


See the Fortran chapter of the users manual and
petsc/src/snes/examples/tutorials/ex5f.F for details.








See Also

 VecRestoreArray(), VecGetArrays(), VecGetArrayF90(), VecPlaceArray(), VecGetArray2d()

Level:beginner

Location:src/vec/interface/vector.c

Index of all Vec routines

Table of Contents for all manual pages

Index of all manual pages
src/vec/examples/tutorials/ex3.c.html

src/vec/examples/tutorials/ex6.c.html

src/vec/examples/tutorials/ex9.c.html

src/vec/examples/tutorials/ex13.c.html

src/vec/examples/tutorials/ex4f.F.html

src/sles/examples/tutorials/ex10.c.html

src/sles/examples/tutorials/ex11.c.html

src/sles/examples/tutorials/ex27.c.html

src/sles/examples/tutorials/ex2f.F.html

src/sles/examples/tutorials/ex14f.F.html