1*c4762a1bSJed Brown static char help[] = "Tests MatShift for SeqAIJ matrices with some missing diagonal entries\n\n"; 2*c4762a1bSJed Brown 3*c4762a1bSJed Brown #include <petscmat.h> 4*c4762a1bSJed Brown 5*c4762a1bSJed Brown int main(int argc,char **argv) 6*c4762a1bSJed Brown { 7*c4762a1bSJed Brown Mat A; 8*c4762a1bSJed Brown PetscInt coli[4],row; 9*c4762a1bSJed Brown PetscScalar vali[4]; 10*c4762a1bSJed Brown PetscErrorCode ierr; 11*c4762a1bSJed Brown PetscMPIInt size; 12*c4762a1bSJed Brown 13*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 14*c4762a1bSJed Brown ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr); 15*c4762a1bSJed Brown if (size != 1) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP,"This is a uniprocessor example only!"); 16*c4762a1bSJed Brown 17*c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_SELF,&A);CHKERRQ(ierr); 18*c4762a1bSJed Brown ierr = MatSetSizes(A,4,4,4,4);CHKERRQ(ierr); 19*c4762a1bSJed Brown ierr = MatSetType(A,MATSEQAIJ);CHKERRQ(ierr); 20*c4762a1bSJed Brown ierr = MatSeqAIJSetPreallocation(A,4,NULL);CHKERRQ(ierr); 21*c4762a1bSJed Brown 22*c4762a1bSJed Brown row = 0; coli[0] = 1; coli[1] = 3; vali[0] = 1.0; vali[1] = 2.0; 23*c4762a1bSJed Brown ierr = MatSetValues(A,1,&row,2,coli,vali,ADD_VALUES);CHKERRQ(ierr); 24*c4762a1bSJed Brown 25*c4762a1bSJed 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*c4762a1bSJed Brown ierr = MatSetValues(A,1,&row,4,coli,vali,ADD_VALUES);CHKERRQ(ierr); 27*c4762a1bSJed Brown 28*c4762a1bSJed Brown row = 2; coli[0] = 0; coli[1] = 3; vali[0] = 7.0; vali[1] = 8.0; 29*c4762a1bSJed Brown ierr = MatSetValues(A,1,&row,2,coli,vali,ADD_VALUES);CHKERRQ(ierr); 30*c4762a1bSJed Brown 31*c4762a1bSJed Brown ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 32*c4762a1bSJed Brown ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 33*c4762a1bSJed Brown ierr = MatView(A,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 34*c4762a1bSJed Brown 35*c4762a1bSJed Brown ierr = MatShift(A,0.0);CHKERRQ(ierr); 36*c4762a1bSJed Brown ierr = MatView(A,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 37*c4762a1bSJed Brown 38*c4762a1bSJed Brown ierr = MatDestroy(&A);CHKERRQ(ierr); 39*c4762a1bSJed Brown ierr = PetscFinalize(); 40*c4762a1bSJed Brown return ierr; 41*c4762a1bSJed Brown } 42*c4762a1bSJed Brown 43*c4762a1bSJed Brown 44*c4762a1bSJed Brown /*TEST 45*c4762a1bSJed Brown 46*c4762a1bSJed Brown test: 47*c4762a1bSJed Brown 48*c4762a1bSJed Brown 49*c4762a1bSJed Brown TEST*/ 50