1 #ifdef PETSC_RCS_HEADER 2 static char vcid[] = "$Id: gcreate.c,v 1.104 1997/07/09 20:56:43 balay Exp bsmith $"; 3 #endif 4 5 #include "sys.h" 6 #include "mat.h" /*I "mat.h" I*/ 7 8 #undef __FUNC__ 9 #define __FUNC__ "MatCreate" 10 /*@C 11 MatCreate - Creates a matrix where the type is determined 12 from the options database. Generates a parallel MPI matrix if the 13 communicator has more than one processor. The default matrix type is 14 AIJ, using the routines MatCreateSeqAIJ() and MatCreateMPIAIJ(). 15 16 Input Parameters: 17 . m - number of global rows 18 . n - number of global columns 19 . comm - MPI communicator 20 21 Output Parameter: 22 . A - the matrix 23 24 Basic Options Database Keys: 25 These options use MatCreateSeqXXX or MatCreateMPIXXX, 26 depending on the communicator, comm. 27 $ -mat_aij : AIJ type 28 $ -mat_baij : block AIJ type 29 $ -mat_dense : dense type 30 $ -mat_bdiag : block diagonal type 31 32 More Options Database Keys: 33 $ -mat_seqaij : AIJ type, uses MatCreateSeqAIJ() 34 $ -mat_mpiaij : AIJ type, uses MatCreateMPIAIJ() 35 $ -mat_seqbdiag : block diagonal type, uses 36 $ MatCreateSeqBDiag() 37 $ -mat_mpibdiag : block diagonal type, uses 38 $ MatCreateMPIBDiag() 39 $ -mat_mpirowbs : rowbs type, uses MatCreateMPIRowbs() 40 $ -mat_seqdense : dense type, uses MatCreateSeqDense() 41 $ -mat_mpidense : dense type, uses MatCreateMPIDense() 42 $ -mat_seqbaij : block AIJ type, uses MatCreateSeqBAIJ() 43 $ -mat_mpibaij : block AIJ type, uses MatCreateMPIBAIJ() 44 45 Even More Options Database Keys: 46 See the manpages for particular formats (e.g., MatCreateSeqAIJ()) 47 for additional format-specific options. 48 49 Notes: 50 This routine calls MatGetTypeFromOptions() to determind the matrix type. 51 52 .keywords: matrix, create 53 54 .seealso: MatCreateSeqAIJ((), MatCreateMPIAIJ(), 55 MatCreateSeqBDiag(),MatCreateMPIBDiag(), 56 MatCreateSeqDense(), MatCreateMPIDense(), 57 MatCreateMPIRowbs(), MatCreateSeqBAIJ, 58 MatConvert(), MatGetTypeFromOptions() 59 @*/ 60 int MatCreate(MPI_Comm comm,int m,int n,Mat *A) 61 { 62 MatType type; 63 PetscTruth set; 64 int ierr, bs=1, flg; 65 66 PetscFunctionBegin; 67 ierr = MatGetTypeFromOptions(comm,0,&type,&set); CHKERRQ(ierr); 68 switch (type) { 69 case MATSEQDENSE: 70 ierr = MatCreateSeqDense(comm,m,n,PETSC_NULL,A); CHKERRQ(ierr); 71 break; 72 case MATMPIBDIAG: 73 ierr = MatCreateMPIBDiag(comm,PETSC_DECIDE,m,n,PETSC_DEFAULT,PETSC_DEFAULT, 74 PETSC_NULL,PETSC_NULL,A); CHKERRQ(ierr); 75 break; 76 case MATSEQBDIAG: 77 ierr = MatCreateSeqBDiag(comm,m,n,PETSC_DEFAULT,PETSC_DEFAULT,PETSC_NULL, 78 PETSC_NULL,A); CHKERRQ(ierr); 79 break; 80 case MATMPIROWBS: 81 ierr = MatCreateMPIRowbs(comm,PETSC_DECIDE,m,PETSC_DEFAULT,PETSC_NULL, 82 PETSC_NULL,A); CHKERRQ(ierr); 83 break; 84 case MATMPIDENSE: 85 ierr = MatCreateMPIDense(comm,PETSC_DECIDE,PETSC_DECIDE,m,n,PETSC_NULL,A); CHKERRQ(ierr); 86 break; 87 case MATMPIAIJ: 88 ierr = MatCreateMPIAIJ(comm,PETSC_DECIDE,PETSC_DECIDE,m,n,PETSC_DEFAULT, 89 PETSC_NULL,PETSC_DEFAULT,PETSC_NULL,A); CHKERRQ(ierr); 90 break; 91 case MATSEQBAIJ: 92 ierr = OptionsGetInt(PETSC_NULL,"-mat_block_size",&bs,&flg); CHKERRQ(ierr); 93 ierr = MatCreateSeqBAIJ(comm,bs,m,n,PETSC_DEFAULT,PETSC_NULL,A); CHKERRQ(ierr); 94 break; 95 case MATMPIBAIJ: 96 ierr = OptionsGetInt(PETSC_NULL,"-mat_block_size",&bs,&flg); CHKERRQ(ierr); 97 ierr = MatCreateMPIBAIJ(comm,bs,PETSC_DECIDE,PETSC_DECIDE,m,n,PETSC_DEFAULT,PETSC_NULL,PETSC_DEFAULT,PETSC_NULL,A); CHKERRQ(ierr); 98 break; 99 default: 100 ierr = MatCreateSeqAIJ(comm,m,n,PETSC_DEFAULT,PETSC_NULL,A); CHKERRQ(ierr); 101 break; 102 } 103 PetscFunctionReturn(0); 104 } 105 106 107 108 109 110