1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Passes a sparse matrix to MATLAB.\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown #include <petscmat.h> 5c4762a1bSJed Brown 6c4762a1bSJed Brown int main(int argc,char **args) 7c4762a1bSJed Brown { 8c4762a1bSJed Brown PetscInt m = 4,n = 5,i,j,II,J; 9c4762a1bSJed Brown PetscScalar one = 1.0,v; 10c4762a1bSJed Brown Vec x; 11c4762a1bSJed Brown Mat A; 12c4762a1bSJed Brown 13*9566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 14*9566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL)); 15*9566063dSJacob Faibussowitsch PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); 16c4762a1bSJed Brown 17*9566063dSJacob Faibussowitsch PetscCall(MatCreate(PETSC_COMM_WORLD,&A)); 18*9566063dSJacob Faibussowitsch PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n)); 19*9566063dSJacob Faibussowitsch PetscCall(MatSetFromOptions(A)); 20*9566063dSJacob Faibussowitsch PetscCall(MatSetUp(A)); 21c4762a1bSJed Brown 22c4762a1bSJed Brown for (i=0; i<m; i++) { 23c4762a1bSJed Brown for (j=0; j<n; j++) { 24c4762a1bSJed Brown v = -1.0; II = j + n*i; 25*9566063dSJacob Faibussowitsch if (i>0) {J = II - n; PetscCall(MatSetValues(A,1,&II,1,&J,&v,INSERT_VALUES));} 26*9566063dSJacob Faibussowitsch if (i<m-1) {J = II + n; PetscCall(MatSetValues(A,1,&II,1,&J,&v,INSERT_VALUES));} 27*9566063dSJacob Faibussowitsch if (j>0) {J = II - 1; PetscCall(MatSetValues(A,1,&II,1,&J,&v,INSERT_VALUES));} 28*9566063dSJacob Faibussowitsch if (j<n-1) {J = II + 1; PetscCall(MatSetValues(A,1,&II,1,&J,&v,INSERT_VALUES));} 29*9566063dSJacob Faibussowitsch v = 4.0; PetscCall(MatSetValues(A,1,&II,1,&II,&v,INSERT_VALUES)); 30c4762a1bSJed Brown } 31c4762a1bSJed Brown } 32*9566063dSJacob Faibussowitsch PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY)); 33*9566063dSJacob Faibussowitsch PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY)); 34c4762a1bSJed Brown #if defined(PETSC_USE_SOCKET_VIEWER) 35*9566063dSJacob Faibussowitsch PetscCall(MatView(A,PETSC_VIEWER_SOCKET_WORLD)); 36c4762a1bSJed Brown #endif 37*9566063dSJacob Faibussowitsch PetscCall(VecCreateSeq(PETSC_COMM_SELF,m,&x)); 38*9566063dSJacob Faibussowitsch PetscCall(VecSet(x,one)); 39c4762a1bSJed Brown #if defined(PETSC_USE_SOCKET_VIEWER) 40*9566063dSJacob Faibussowitsch PetscCall(VecView(x,PETSC_VIEWER_SOCKET_WORLD)); 41c4762a1bSJed Brown #endif 42c4762a1bSJed Brown 43*9566063dSJacob Faibussowitsch PetscCall(PetscSleep(30)); 44c4762a1bSJed Brown 45*9566063dSJacob Faibussowitsch PetscCall(VecDestroy(&x)); 46*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&A)); 47*9566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 48b122ec5aSJacob Faibussowitsch return 0; 49c4762a1bSJed Brown } 50c4762a1bSJed Brown 51c4762a1bSJed Brown /*TEST 52c4762a1bSJed Brown 53c4762a1bSJed Brown test: 54c4762a1bSJed Brown TODO: cannot test with socket viewer 55c4762a1bSJed Brown 56c4762a1bSJed Brown TEST*/ 57