Actual source code: ex58f.F90
1: !
2: !
3: ! This program demonstrates use of MatGetRow() and MatGetRowMaxAbs() from Fortran
4: !
5: program main
6: #include <petsc/finclude/petscmat.h>
7: use petscmat
8: implicit none
10: Mat A
11: PetscErrorCode ierr
12: PetscInt M,N
13: PetscViewer v
14: Vec rowmax
15: PetscBool flg
16: IS isrow, iscol
17: character*(256) f
19: PetscCallA(PetscInitialize(ierr))
21: PetscCallA(PetscOptionsGetString(PETSC_NULL_OPTIONS,PETSC_NULL_CHARACTER,'-f',f,flg,ierr))
22: PetscCallA(PetscViewerBinaryOpen(PETSC_COMM_WORLD,f,FILE_MODE_READ,v,ierr))
24: PetscCallA(MatCreate(PETSC_COMM_WORLD,A,ierr))
25: PetscCallA(MatSetType(A, MATSEQAIJ,ierr))
26: PetscCallA(MatLoad(A,v,ierr))
28: PetscCallA(MatView(A,PETSC_VIEWER_STDOUT_WORLD,ierr))
30: !
31: ! Test MatGetRowMaxAbs()
32: PetscCallA(MatGetSize(A,M,N,ierr))
33: PetscCallA(VecCreate(PETSC_COMM_WORLD,rowmax,ierr))
34: PetscCallA(VecSetSizes(rowmax,M,M,ierr))
35: PetscCallA(VecSetFromOptions(rowmax,ierr))
37: PetscCallA(MatGetRowMaxAbs(A,rowmax,PETSC_NULL_INTEGER_ARRAY,ierr))
38: PetscCallA(VecView(rowmax,PETSC_VIEWER_STDOUT_WORLD,ierr))
40: PetscCallA(MatGetRowMax(A,rowmax,PETSC_NULL_INTEGER_ARRAY,ierr))
41: PetscCallA(VecView(rowmax,PETSC_VIEWER_STDOUT_WORLD,ierr))
43: PetscCallA(MatGetRowMinAbs(A,rowmax,PETSC_NULL_INTEGER_ARRAY,ierr))
44: PetscCallA(VecView(rowmax,PETSC_VIEWER_STDOUT_WORLD,ierr))
46: PetscCallA(MatGetRowMin(A,rowmax,PETSC_NULL_INTEGER_ARRAY,ierr))
47: PetscCallA(VecView(rowmax,PETSC_VIEWER_STDOUT_WORLD,ierr))
49: PetscCallA(MatGetOwnershipIS(A,isrow,iscol,ierr))
50: PetscCallA(ISDestroy(isrow,ierr))
51: PetscCallA(ISDestroy(iscol,ierr))
52: PetscCallA(MatGetOwnershipIS(A,PETSC_NULL_IS,PETSC_NULL_IS,ierr))
54: PetscCallA(MatDestroy(A,ierr))
55: PetscCallA(PetscViewerDestroy(v,ierr))
56: PetscCallA(VecDestroy(rowmax,ierr))
58: PetscCallA(PetscFinalize(ierr))
59: end
61: !/*TEST
62: !
63: ! test:
64: ! args: -f ${DATAFILESPATH}/matrices/tiny
65: ! requires: datafilespath double !complex !defined(PETSC_USE_64BIT_INDICES)
66: !
67: !TEST*/