1 static char help[] = "Basic test of various routines with SBAIJ matrices\n\n"; 2 3 #include <petscmat.h> 4 5 int main(int argc,char **argv) 6 { 7 PetscInt ia[3]={0,2,4}; 8 PetscInt ja[4]={0,1,0,1}; 9 PetscScalar c[16]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; 10 PetscMPIInt size; 11 Mat ssbaij,msbaij; 12 Vec x,y; 13 14 PetscFunctionBeginUser; 15 PetscCall(PetscInitialize(&argc,&argv,NULL,help)); 16 PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD,&size)); 17 PetscCheck(size == 2,PETSC_COMM_WORLD,PETSC_ERR_WRONG_MPI_SIZE,"This is an example with two processors only!"); 18 PetscCall(MatCreate(PETSC_COMM_SELF,&ssbaij)); 19 PetscCall(MatSetType(ssbaij,MATSEQSBAIJ)); 20 PetscCall(MatSetBlockSize(ssbaij,2)); 21 PetscCall(MatSetSizes(ssbaij,4,8,4,8)); 22 PetscCall(MatSeqSBAIJSetPreallocationCSR(ssbaij,2,ia,ja,c)); 23 PetscCall(MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,ssbaij,PETSC_DECIDE,MAT_INITIAL_MATRIX,&msbaij)); 24 PetscCall(MatView(msbaij,PETSC_VIEWER_STDOUT_WORLD)); 25 PetscCall(MatDestroy(&msbaij)); 26 PetscCall(MatCreateMPIMatConcatenateSeqMat(PETSC_COMM_WORLD,ssbaij,4,MAT_INITIAL_MATRIX,&msbaij)); 27 PetscCall(MatView(msbaij,PETSC_VIEWER_STDOUT_WORLD)); 28 PetscCall(MatCreateVecs(msbaij,&x,&y)); 29 PetscCall(VecSet(x,1)); 30 PetscCall(MatMult(msbaij,x,y)); 31 PetscCall(VecView(y,PETSC_VIEWER_STDOUT_WORLD)); 32 PetscCall(MatMultAdd(msbaij,x,x,y)); 33 PetscCall(VecView(y,PETSC_VIEWER_STDOUT_WORLD)); 34 PetscCall(MatGetDiagonal(msbaij,y)); 35 PetscCall(VecView(y,PETSC_VIEWER_STDOUT_WORLD)); 36 PetscCall(VecDestroy(&x)); 37 PetscCall(VecDestroy(&y)); 38 PetscCall(MatDestroy(&msbaij)); 39 PetscCall(MatDestroy(&ssbaij)); 40 PetscCall(PetscFinalize()); 41 return 0; 42 } 43 44 /*TEST 45 46 test: 47 nsize: 2 48 filter: sed "s?\.??g" 49 50 TEST*/ 51