petsc-3.7.7 2017-09-25

VecGetArrayF90

Accesses a vector array from Fortran90. For default PETSc vectors, VecGetArrayF90() returns a pointer to the local data array. Otherwise, this routine is implementation dependent. You MUST call VecRestoreArrayF90() when you no longer need access to the array.

Synopsis

VecGetArrayF90(Vec x,{Scalar, pointer :: xx_v(:)},integer ierr)

Logically Collective on Vec

Input Parameter

x -vector

Output Parameters

	xx_v	- the Fortran90 pointer to the array
	ierr	- error code

Example of Usage

    PetscScalar, pointer :: xx_v(:)
    ....
    call VecGetArrayF90(x,xx_v,ierr)
    xx_v(3) = a
    call VecRestoreArrayF90(x,xx_v,ierr)

If you ONLY intend to read entries from the array and not change any entries you should use VecGetArrayReadF90().

Examples