1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests the use of MatZeroRows() for uniprocessor matrices.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6*9371c9d4SSatish Balay int main(int argc, char **args) { 7c4762a1bSJed Brown Mat C; 8c4762a1bSJed Brown PetscInt i, j, m = 5, n = 5, Ii, J; 9c4762a1bSJed Brown PetscScalar v, five = 5.0; 10c4762a1bSJed Brown IS isrow; 11c4762a1bSJed Brown PetscBool keepnonzeropattern; 12c4762a1bSJed Brown 13327415f7SBarry Smith PetscFunctionBeginUser; 149566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 15c4762a1bSJed Brown /* create the matrix for the five point stencil, YET AGAIN*/ 169566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_SELF, &C)); 179566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n)); 189566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 199566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 20c4762a1bSJed Brown for (i = 0; i < m; i++) { 21c4762a1bSJed Brown for (j = 0; j < n; j++) { 22*9371c9d4SSatish Balay v = -1.0; 23*9371c9d4SSatish Balay Ii = j + n * i; 24*9371c9d4SSatish Balay if (i > 0) { 25*9371c9d4SSatish Balay J = Ii - n; 26*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 27*9371c9d4SSatish Balay } 28*9371c9d4SSatish Balay if (i < m - 1) { 29*9371c9d4SSatish Balay J = Ii + n; 30*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 31*9371c9d4SSatish Balay } 32*9371c9d4SSatish Balay if (j > 0) { 33*9371c9d4SSatish Balay J = Ii - 1; 34*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 35*9371c9d4SSatish Balay } 36*9371c9d4SSatish Balay if (j < n - 1) { 37*9371c9d4SSatish Balay J = Ii + 1; 38*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES)); 39*9371c9d4SSatish Balay } 40*9371c9d4SSatish Balay v = 4.0; 41*9371c9d4SSatish Balay PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES)); 42c4762a1bSJed Brown } 43c4762a1bSJed Brown } 449566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY)); 459566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY)); 46c4762a1bSJed Brown 479566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_SELF, (m * n) / 2, 0, 2, &isrow)); 48c4762a1bSJed Brown 499566063dSJacob Faibussowitsch PetscCall(PetscOptionsHasName(NULL, NULL, "-keep_nonzero_pattern", &keepnonzeropattern)); 501baa6e33SBarry Smith if (keepnonzeropattern) PetscCall(MatSetOption(C, MAT_KEEP_NONZERO_PATTERN, PETSC_TRUE)); 51c4762a1bSJed Brown 529566063dSJacob Faibussowitsch PetscCall(MatZeroRowsIS(C, isrow, five, 0, 0)); 53c4762a1bSJed Brown 549566063dSJacob Faibussowitsch PetscCall(MatView(C, PETSC_VIEWER_STDOUT_SELF)); 55c4762a1bSJed Brown 569566063dSJacob Faibussowitsch PetscCall(ISDestroy(&isrow)); 579566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 589566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 59b122ec5aSJacob Faibussowitsch return 0; 60c4762a1bSJed Brown } 61c4762a1bSJed Brown 62c4762a1bSJed Brown /*TEST 63c4762a1bSJed Brown 64c4762a1bSJed Brown test: 65c4762a1bSJed Brown 66c4762a1bSJed Brown test: 67c4762a1bSJed Brown suffix: 2 68c4762a1bSJed Brown args: -mat_type seqbaij -mat_block_size 5 69c4762a1bSJed Brown 70c4762a1bSJed Brown test: 71c4762a1bSJed Brown suffix: 3 72c4762a1bSJed Brown args: -keep_nonzero_pattern 73c4762a1bSJed Brown 74c4762a1bSJed Brown test: 75c4762a1bSJed Brown suffix: 4 76c4762a1bSJed Brown args: -keep_nonzero_pattern -mat_type seqbaij -mat_block_size 5 77c4762a1bSJed Brown 78c4762a1bSJed Brown TEST*/ 79