PETSc version 3.15.5
VecGetArrayReadF90
Accesses a read only 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 VecRestoreArrayReadF90() when you no longer need access to the array. 
Synopsis
VecGetArrayReadF90(Vec x,{Scalar, pointer :: xx_v(:)},integer ierr)
Logically Collective on Vec
Input Parameter
Output Parameters
|  | xx_v | - the Fortran90 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)
If you intend to write entries into the array you must use VecGetArrayF90().
See Also
  VecRestoreArrayReadF90(), VecGetArray(), VecRestoreArray(), VecGetArrayRead(), VecRestoreArrayRead(), VecGetArrayF90()
Level
beginner
Location
src/vec/vec/interface/rvector.c
Examples
src/snes/tutorials/ex73f90t.F90.html
Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages