1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Saves a dense matrix in a dense format (binary).\n\n"; 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown #include <petscmat.h> 5*c4762a1bSJed Brown 6*c4762a1bSJed Brown int main(int argc,char **args) 7*c4762a1bSJed Brown { 8*c4762a1bSJed Brown Mat C; 9*c4762a1bSJed Brown PetscScalar v; 10*c4762a1bSJed Brown PetscInt i,j,m = 4,n = 4; 11*c4762a1bSJed Brown PetscErrorCode ierr; 12*c4762a1bSJed Brown PetscMPIInt rank,size; 13*c4762a1bSJed Brown PetscViewer viewer; 14*c4762a1bSJed Brown 15*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 16*c4762a1bSJed Brown ierr = MPI_Comm_rank(PETSC_COMM_WORLD,&rank);CHKERRQ(ierr); 17*c4762a1bSJed Brown ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr); 18*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);CHKERRQ(ierr); 19*c4762a1bSJed Brown ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr); 20*c4762a1bSJed Brown 21*c4762a1bSJed Brown /* PART 1: Generate matrix, then write it in binary format */ 22*c4762a1bSJed Brown 23*c4762a1bSJed Brown /* Generate matrix */ 24*c4762a1bSJed Brown ierr = MatCreateSeqDense(PETSC_COMM_WORLD,m,n,NULL,&C);CHKERRQ(ierr); 25*c4762a1bSJed Brown for (i=0; i<m; i++) { 26*c4762a1bSJed Brown for (j=0; j<n; j++) { 27*c4762a1bSJed Brown v = i*m+j; 28*c4762a1bSJed Brown ierr = MatSetValues(C,1,&i,1,&j,&v,INSERT_VALUES);CHKERRQ(ierr); 29*c4762a1bSJed Brown } 30*c4762a1bSJed Brown } 31*c4762a1bSJed Brown ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 32*c4762a1bSJed Brown ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 33*c4762a1bSJed Brown ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,"matrix.dat",FILE_MODE_WRITE,&viewer);CHKERRQ(ierr); 34*c4762a1bSJed Brown ierr = MatView(C,viewer);CHKERRQ(ierr); 35*c4762a1bSJed Brown ierr = PetscViewerDestroy(&viewer);CHKERRQ(ierr); 36*c4762a1bSJed Brown ierr = MatDestroy(&C);CHKERRQ(ierr); 37*c4762a1bSJed Brown ierr = PetscFinalize(); 38*c4762a1bSJed Brown return ierr; 39*c4762a1bSJed Brown } 40*c4762a1bSJed Brown 41*c4762a1bSJed Brown /*TEST 42*c4762a1bSJed Brown 43*c4762a1bSJed Brown test: 44*c4762a1bSJed Brown 45*c4762a1bSJed Brown TEST*/ 46