petsc-3.14.6 2021-03-30
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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

#include <petsc/finclude/petscvec.h>
    use petscvec

    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().

See Also

VecRestoreArrayF90(), VecGetArray(), VecRestoreArray(), VecGetArrayReadF90(), UsingFortran

Level

beginner

Location

src/vec/vec/interface/rvector.c

Examples

src/vec/vec/tutorials/ex4f90.F90.html
src/vec/vec/tutorials/ex6f.F90.html
src/snes/tutorials/ex5f90.F90.html
src/snes/tutorials/ex5f90t.F90.html
src/snes/tutorials/ex73f90t.F90.html

Index of all Vec routines
Table of Contents for all manual pages
Index of all manual pages