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*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscInitialize(&argc,&args,(char*)0,help)); 15c4762a1bSJed Brown /* create the matrix for the five point stencil, YET AGAIN*/ 165f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_SELF,&C)); 175f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 185f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetFromOptions(C)); 195f80ce2aSJacob Faibussowitsch CHKERRQ(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; 235f80ce2aSJacob Faibussowitsch if (i>0) {J = Ii - n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 245f80ce2aSJacob Faibussowitsch if (i<m-1) {J = Ii + n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 255f80ce2aSJacob Faibussowitsch if (j>0) {J = Ii - 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 265f80ce2aSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 275f80ce2aSJacob Faibussowitsch v = 4.0; CHKERRQ(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 28c4762a1bSJed Brown } 29c4762a1bSJed Brown } 305f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 315f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 32c4762a1bSJed Brown 335f80ce2aSJacob Faibussowitsch CHKERRQ(ISCreateStride(PETSC_COMM_SELF,(m*n)/2,0,2,&isrow)); 34c4762a1bSJed Brown 355f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsHasName(NULL,NULL,"-keep_nonzero_pattern",&keepnonzeropattern)); 36c4762a1bSJed Brown if (keepnonzeropattern) { 375f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetOption(C,MAT_KEEP_NONZERO_PATTERN,PETSC_TRUE)); 38c4762a1bSJed Brown } 39c4762a1bSJed Brown 405f80ce2aSJacob Faibussowitsch CHKERRQ(MatZeroRowsIS(C,isrow,five,0,0)); 41c4762a1bSJed Brown 425f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(C,PETSC_VIEWER_STDOUT_SELF)); 43c4762a1bSJed Brown 445f80ce2aSJacob Faibussowitsch CHKERRQ(ISDestroy(&isrow)); 455f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&C)); 46*b122ec5aSJacob Faibussowitsch CHKERRQ(PetscFinalize()); 47*b122ec5aSJacob 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