1c4762a1bSJed Brown static char help[] = "Tests MatShift for SeqAIJ matrices with some missing diagonal entries\n\n"; 2c4762a1bSJed Brown 3c4762a1bSJed Brown #include <petscmat.h> 4c4762a1bSJed Brown 5c4762a1bSJed Brown int main(int argc,char **argv) 6c4762a1bSJed Brown { 7c4762a1bSJed Brown Mat A; 8c4762a1bSJed Brown PetscInt coli[4],row; 9c4762a1bSJed Brown PetscScalar vali[4]; 10c4762a1bSJed Brown PetscErrorCode ierr; 11c4762a1bSJed Brown PetscMPIInt size; 12c4762a1bSJed Brown 13c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 14ffc4695bSBarry Smith ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRMPI(ierr); 15*2c71b3e2SJacob Faibussowitsch PetscCheckFalse(size != 1,PETSC_COMM_WORLD,PETSC_ERR_SUP,"This is a uniprocessor example only!"); 16c4762a1bSJed Brown 17c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_SELF,&A);CHKERRQ(ierr); 18c4762a1bSJed Brown ierr = MatSetSizes(A,4,4,4,4);CHKERRQ(ierr); 19c4762a1bSJed Brown ierr = MatSetType(A,MATSEQAIJ);CHKERRQ(ierr); 20c4762a1bSJed Brown ierr = MatSeqAIJSetPreallocation(A,4,NULL);CHKERRQ(ierr); 21c4762a1bSJed Brown 22c4762a1bSJed Brown row = 0; coli[0] = 1; coli[1] = 3; vali[0] = 1.0; vali[1] = 2.0; 23c4762a1bSJed Brown ierr = MatSetValues(A,1,&row,2,coli,vali,ADD_VALUES);CHKERRQ(ierr); 24c4762a1bSJed Brown 25c4762a1bSJed Brown row = 1; coli[0] = 0; coli[1] = 1; coli[2] = 2; coli[3] = 3; vali[0] = 3.0; vali[1] = 4.0; vali[2] = 5.0; vali[3] = 6.0; 26c4762a1bSJed Brown ierr = MatSetValues(A,1,&row,4,coli,vali,ADD_VALUES);CHKERRQ(ierr); 27c4762a1bSJed Brown 28c4762a1bSJed Brown row = 2; coli[0] = 0; coli[1] = 3; vali[0] = 7.0; vali[1] = 8.0; 29c4762a1bSJed Brown ierr = MatSetValues(A,1,&row,2,coli,vali,ADD_VALUES);CHKERRQ(ierr); 30c4762a1bSJed Brown 31c4762a1bSJed Brown ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 32c4762a1bSJed Brown ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 33c4762a1bSJed Brown ierr = MatView(A,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 34c4762a1bSJed Brown 35c4762a1bSJed Brown ierr = MatShift(A,0.0);CHKERRQ(ierr); 36c4762a1bSJed Brown ierr = MatView(A,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 37c4762a1bSJed Brown 38c4762a1bSJed Brown ierr = MatDestroy(&A);CHKERRQ(ierr); 39c4762a1bSJed Brown ierr = PetscFinalize(); 40c4762a1bSJed Brown return ierr; 41c4762a1bSJed Brown } 42c4762a1bSJed Brown 43c4762a1bSJed Brown /*TEST 44c4762a1bSJed Brown 45c4762a1bSJed Brown test: 46c4762a1bSJed Brown 47c4762a1bSJed Brown TEST*/ 48