VecGetArrayReadF90#
Accesses a read only array from Fortran. For default PETSc vectors, VecGetArrayF90() returns a pointer to the local data array. Otherwise, this routine is implementation dependent. You MUST call VecRestoreArrayReadF90() when you no longer need access to the array.
Synopsis#
VecGetArrayReadF90(Vec x,{Scalar, pointer :: xx_v(:)},integer ierr)
Logically Collective
Input Parameter#
x - vector
Output Parameters#
xx_v - the Fortran pointer to the array
ierr - error code
Example of Usage#
#include <petsc/finclude/petscvec.h>
use petscvec
PetscScalar, pointer :: xx_v(:)
....
call VecGetArrayReadF90(x,xx_v,ierr)
a = xx_v(3)
call VecRestoreArrayReadF90(x,xx_v,ierr)
Note#
If you intend to write entries into the array you must use VecGetArrayF90().
See Also#
Vectors and Parallel Data, Vec, VecRestoreArrayReadF90(), VecGetArray(), VecRestoreArray(), VecGetArrayRead(), VecRestoreArrayRead(), VecGetArrayF90()
Level#
beginner
Location#
src/vec/vec/interface/rvector.c
Index of all Vec routines
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Index of all manual pages