1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Tests converting a matrix to another format with MatConvert().\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,A; 9*c4762a1bSJed Brown PetscInt i,j,m = 5,n = 4,Ii,J; 10*c4762a1bSJed Brown PetscErrorCode ierr; 11*c4762a1bSJed Brown PetscMPIInt rank,size; 12*c4762a1bSJed Brown PetscScalar v; 13*c4762a1bSJed Brown char mtype[256]; 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 18*c4762a1bSJed Brown /* This example does not work correctly for np > 2 */ 19*c4762a1bSJed Brown ierr = MPI_Comm_size(PETSC_COMM_WORLD,&size);CHKERRQ(ierr); 20*c4762a1bSJed Brown if (size > 2) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_WRONG_MPI_SIZE,"Use np <= 2"); 21*c4762a1bSJed Brown 22*c4762a1bSJed Brown /* Create the matrix for the five point stencil, YET AGAIN */ 23*c4762a1bSJed Brown ierr = MatCreate(PETSC_COMM_WORLD,&C);CHKERRQ(ierr); 24*c4762a1bSJed Brown ierr = MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n);CHKERRQ(ierr); 25*c4762a1bSJed Brown ierr = MatSetFromOptions(C);CHKERRQ(ierr); 26*c4762a1bSJed Brown ierr = MatSetUp(C);CHKERRQ(ierr); 27*c4762a1bSJed Brown for (i=0; i<m; i++) { 28*c4762a1bSJed Brown for (j=2*rank; j<2*rank+2; j++) { 29*c4762a1bSJed Brown v = -1.0; Ii = j + n*i; 30*c4762a1bSJed Brown if (i>0) {J = Ii - n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 31*c4762a1bSJed Brown if (i<m-1) {J = Ii + n; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 32*c4762a1bSJed Brown if (j>0) {J = Ii - 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 33*c4762a1bSJed Brown if (j<n-1) {J = Ii + 1; ierr = MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);CHKERRQ(ierr);} 34*c4762a1bSJed Brown v = 4.0; ierr = MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES);CHKERRQ(ierr); 35*c4762a1bSJed Brown } 36*c4762a1bSJed Brown } 37*c4762a1bSJed Brown 38*c4762a1bSJed Brown ierr = MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 39*c4762a1bSJed Brown ierr = MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 40*c4762a1bSJed Brown ierr = PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO);CHKERRQ(ierr); 41*c4762a1bSJed Brown ierr = MatView(C,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 42*c4762a1bSJed Brown ierr = PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 43*c4762a1bSJed Brown ierr = MatView(C,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 44*c4762a1bSJed Brown 45*c4762a1bSJed Brown ierr = PetscStrcpy(mtype,MATSAME);CHKERRQ(ierr); 46*c4762a1bSJed Brown ierr = PetscOptionsGetString(NULL,NULL,"-conv_mat_type",mtype,256,NULL);CHKERRQ(ierr); 47*c4762a1bSJed Brown ierr = MatConvert(C,mtype,MAT_INITIAL_MATRIX,&A);CHKERRQ(ierr); 48*c4762a1bSJed Brown ierr = PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO);CHKERRQ(ierr); 49*c4762a1bSJed Brown ierr = MatView(A,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 50*c4762a1bSJed Brown ierr = PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 51*c4762a1bSJed Brown ierr = PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_IMPL);CHKERRQ(ierr); 52*c4762a1bSJed Brown ierr = MatView(A,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 53*c4762a1bSJed Brown ierr = PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 54*c4762a1bSJed Brown 55*c4762a1bSJed Brown /* Free data structures */ 56*c4762a1bSJed Brown ierr = MatDestroy(&A);CHKERRQ(ierr); 57*c4762a1bSJed Brown ierr = MatDestroy(&C);CHKERRQ(ierr); 58*c4762a1bSJed Brown 59*c4762a1bSJed Brown ierr = PetscFinalize(); 60*c4762a1bSJed Brown return ierr; 61*c4762a1bSJed Brown } 62*c4762a1bSJed Brown 63*c4762a1bSJed Brown 64*c4762a1bSJed Brown /*TEST 65*c4762a1bSJed Brown 66*c4762a1bSJed Brown test: 67*c4762a1bSJed Brown args: -conv_mat_type seqaij 68*c4762a1bSJed Brown 69*c4762a1bSJed Brown TEST*/ 70