1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests converting a matrix to another format with MatConvert().\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown Mat C,A; 9c4762a1bSJed Brown PetscInt i,j,m = 5,n = 4,Ii,J; 10c4762a1bSJed Brown PetscErrorCode ierr; 11c4762a1bSJed Brown PetscMPIInt rank,size; 12c4762a1bSJed Brown PetscScalar v; 13c4762a1bSJed Brown char mtype[256]; 14c4762a1bSJed Brown 15c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 16*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(PETSC_COMM_WORLD,&rank)); 17c4762a1bSJed Brown 18c4762a1bSJed Brown /* This example does not work correctly for np > 2 */ 19*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 202c71b3e2SJacob Faibussowitsch PetscCheckFalse(size > 2,PETSC_COMM_WORLD,PETSC_ERR_WRONG_MPI_SIZE,"Use np <= 2"); 21c4762a1bSJed Brown 22c4762a1bSJed Brown /* Create the matrix for the five point stencil, YET AGAIN */ 23*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreate(PETSC_COMM_WORLD,&C)); 24*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 25*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetFromOptions(C)); 26*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatSetUp(C)); 27c4762a1bSJed Brown for (i=0; i<m; i++) { 28c4762a1bSJed Brown for (j=2*rank; j<2*rank+2; j++) { 29c4762a1bSJed Brown v = -1.0; Ii = j + n*i; 30*5f80ce2aSJacob Faibussowitsch if (i>0) {J = Ii - n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 31*5f80ce2aSJacob Faibussowitsch if (i<m-1) {J = Ii + n; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 32*5f80ce2aSJacob Faibussowitsch if (j>0) {J = Ii - 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 33*5f80ce2aSJacob Faibussowitsch if (j<n-1) {J = Ii + 1; CHKERRQ(MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES));} 34*5f80ce2aSJacob Faibussowitsch v = 4.0; CHKERRQ(MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES)); 35c4762a1bSJed Brown } 36c4762a1bSJed Brown } 37c4762a1bSJed Brown 38*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY)); 39*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY)); 40*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO)); 41*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 42*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 43*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(C,PETSC_VIEWER_STDOUT_WORLD)); 44c4762a1bSJed Brown 45*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscStrcpy(mtype,MATSAME)); 46*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscOptionsGetString(NULL,NULL,"-conv_mat_type",mtype,sizeof(mtype),NULL)); 47*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatConvert(C,mtype,MAT_INITIAL_MATRIX,&A)); 48*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_INFO)); 49*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(A,PETSC_VIEWER_STDOUT_WORLD)); 50*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 51*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPushFormat(PETSC_VIEWER_STDOUT_WORLD,PETSC_VIEWER_ASCII_IMPL)); 52*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(A,PETSC_VIEWER_STDOUT_WORLD)); 53*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscViewerPopFormat(PETSC_VIEWER_STDOUT_WORLD)); 54c4762a1bSJed Brown 55c4762a1bSJed Brown /* Free data structures */ 56*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&A)); 57*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&C)); 58c4762a1bSJed Brown 59c4762a1bSJed Brown ierr = PetscFinalize(); 60c4762a1bSJed Brown return ierr; 61c4762a1bSJed Brown } 62c4762a1bSJed Brown 63c4762a1bSJed Brown /*TEST 64c4762a1bSJed Brown 65c4762a1bSJed Brown test: 66c4762a1bSJed Brown args: -conv_mat_type seqaij 67c4762a1bSJed Brown 68c4762a1bSJed Brown TEST*/ 69