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 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat C; 9c4762a1bSJed Brown PetscInt i,j,m = 5,n = 5,Ii,J; 10c4762a1bSJed Brown PetscScalar v,five = 5.0; 11c4762a1bSJed Brown IS isrow; 12c4762a1bSJed Brown PetscBool keepnonzeropattern; 13c4762a1bSJed Brown 14*9566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 15c4762a1bSJed Brown /* create the matrix for the five point stencil, YET AGAIN*/ 16*9566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_SELF,&C)); 17*9566063dSJacob Faibussowitsch PetscCall(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 18*9566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(C)); 19*9566063dSJacob Faibussowitsch PetscCall(MatSetUp(C)); 20c4762a1bSJed Brown for (i=0; i<m; i++) { 21c4762a1bSJed Brown for (j=0; j<n; j++) { 22c4762a1bSJed Brown v = -1.0; Ii = j + n*i; 23*9566063dSJacob Faibussowitsch if (i>0) {J = Ii - n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 24*9566063dSJacob Faibussowitsch if (i<m-1) {J = Ii + n; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 25*9566063dSJacob Faibussowitsch if (j>0) {J = Ii - 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 26*9566063dSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; PetscCall(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 27*9566063dSJacob Faibussowitsch v = 4.0; PetscCall(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 28c4762a1bSJed Brown } 29c4762a1bSJed Brown } 30*9566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 31*9566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 32c4762a1bSJed Brown 33*9566063dSJacob Faibussowitsch PetscCall(ISCreateStride(PETSC_COMM_SELF,(m*n)/2,0,2,&isrow)); 34c4762a1bSJed Brown 35*9566063dSJacob Faibussowitsch PetscCall(PetscOptionsHasName(NULL,NULL,"-keep_nonzero_pattern",&keepnonzeropattern)); 36c4762a1bSJed Brown if (keepnonzeropattern) { 37*9566063dSJacob Faibussowitsch PetscCall(MatSetOption(C,MAT_KEEP_NONZERO_PATTERN,PETSC_TRUE)); 38c4762a1bSJed Brown } 39c4762a1bSJed Brown 40*9566063dSJacob Faibussowitsch PetscCall(MatZeroRowsIS(C,isrow,five,0,0)); 41c4762a1bSJed Brown 42*9566063dSJacob Faibussowitsch PetscCall(MatView(C,PETSC_VIEWER_STDOUT_SELF)); 43c4762a1bSJed Brown 44*9566063dSJacob Faibussowitsch PetscCall(ISDestroy(&isrow)); 45*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&C)); 46*9566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 47b122ec5aSJacob Faibussowitsch return 0; 48c4762a1bSJed Brown } 49c4762a1bSJed Brown 50c4762a1bSJed Brown /*TEST 51c4762a1bSJed Brown 52c4762a1bSJed Brown test: 53c4762a1bSJed Brown 54c4762a1bSJed Brown test: 55c4762a1bSJed Brown suffix: 2 56c4762a1bSJed Brown args: -mat_type seqbaij -mat_block_size 5 57c4762a1bSJed Brown 58c4762a1bSJed Brown test: 59c4762a1bSJed Brown suffix: 3 60c4762a1bSJed Brown args: -keep_nonzero_pattern 61c4762a1bSJed Brown 62c4762a1bSJed Brown test: 63c4762a1bSJed Brown suffix: 4 64c4762a1bSJed Brown args: -keep_nonzero_pattern -mat_type seqbaij -mat_block_size 5 65c4762a1bSJed Brown 66c4762a1bSJed Brown TEST*/ 67