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; 14*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 152c71b3e2SJacob Faibussowitsch PetscCheckFalse(size != 1,PETSC_COMM_WORLD,PETSC_ERR_SUP,"This is a uniprocessor example only!"); 16c4762a1bSJed Brown 17*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_SELF,&A)); 18*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(A,4,4,4,4)); 19*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetType(A,MATSEQAIJ)); 20*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSeqAIJSetPreallocation(A,4,NULL)); 21c4762a1bSJed Brown 22c4762a1bSJed Brown row = 0; coli[0] = 1; coli[1] = 3; vali[0] = 1.0; vali[1] = 2.0; 23*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(A,1,&row,2,coli,vali,ADD_VALUES)); 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; 26*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(A,1,&row,4,coli,vali,ADD_VALUES)); 27c4762a1bSJed Brown 28c4762a1bSJed Brown row = 2; coli[0] = 0; coli[1] = 3; vali[0] = 7.0; vali[1] = 8.0; 29*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetValues(A,1,&row,2,coli,vali,ADD_VALUES)); 30c4762a1bSJed Brown 31*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 32*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 33*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(A,PETSC_VIEWER_STDOUT_WORLD)); 34c4762a1bSJed Brown 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatShift(A,0.0)); 36*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(A,PETSC_VIEWER_STDOUT_WORLD)); 37c4762a1bSJed Brown 38*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 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