1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Saves a rectangular sparse matrix to disk.\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 A; 9*c4762a1bSJed Brown PetscErrorCode ierr; 10*c4762a1bSJed Brown PetscInt m = 100,n = 11,js[11],i,j,cnt; 11*c4762a1bSJed Brown PetscScalar values[11]; 12*c4762a1bSJed Brown PetscViewer view; 13*c4762a1bSJed Brown 14*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 15*c4762a1bSJed Brown ierr = MatCreateSeqAIJ(PETSC_COMM_WORLD,m,n,20,0,&A);CHKERRQ(ierr); 16*c4762a1bSJed Brown 17*c4762a1bSJed Brown for (i=0; i<n; i++) values[i] = (PetscReal)i; 18*c4762a1bSJed Brown 19*c4762a1bSJed Brown for (i=0; i<m; i++) { 20*c4762a1bSJed Brown cnt = 0; 21*c4762a1bSJed Brown if (i % 2) { 22*c4762a1bSJed Brown for (j=0; j<n; j += 2) { 23*c4762a1bSJed Brown js[cnt++] = j; 24*c4762a1bSJed Brown } 25*c4762a1bSJed Brown } else { 26*c4762a1bSJed Brown ; 27*c4762a1bSJed Brown } 28*c4762a1bSJed Brown ierr = MatSetValues(A,1,&i,cnt,js,values,INSERT_VALUES);CHKERRQ(ierr); 29*c4762a1bSJed Brown } 30*c4762a1bSJed Brown ierr = MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 31*c4762a1bSJed Brown ierr = MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 32*c4762a1bSJed Brown 33*c4762a1bSJed Brown ierr = PetscViewerBinaryOpen(PETSC_COMM_WORLD,"rect",FILE_MODE_WRITE,&view);CHKERRQ(ierr); 34*c4762a1bSJed Brown ierr = MatView(A,view);CHKERRQ(ierr); 35*c4762a1bSJed Brown ierr = PetscViewerDestroy(&view);CHKERRQ(ierr); 36*c4762a1bSJed Brown 37*c4762a1bSJed Brown ierr = MatDestroy(&A);CHKERRQ(ierr); 38*c4762a1bSJed Brown 39*c4762a1bSJed Brown ierr = PetscFinalize(); 40*c4762a1bSJed Brown return ierr; 41*c4762a1bSJed Brown } 42*c4762a1bSJed Brown 43*c4762a1bSJed Brown 44*c4762a1bSJed Brown 45*c4762a1bSJed Brown /*TEST 46*c4762a1bSJed Brown 47*c4762a1bSJed Brown test: 48*c4762a1bSJed Brown 49*c4762a1bSJed Brown TEST*/ 50