1 #ifndef lint 2 static char vcid[] = "$Id: gcreate.c,v 1.24 1995/05/25 22:48:06 bsmith Exp curfman $"; 3 #endif 4 5 #include "sys.h" 6 #include "sysio.h" 7 #include "mat.h" 8 9 /*@C 10 MatCreate - Creates a matrix, where the type is determined 11 from the options database. Generates a parallel MPI matrix if the 12 communicator has more than one processor. 13 14 Input Parameters: 15 . m - number of global rows 16 . n - number of global columns 17 . comm - MPI communicator 18 19 Output Parameter: 20 . V - location to stash resulting matrix 21 22 Options Database Keywords: 23 $ -mat_aij : AIJ type, uses MatCreateSequentialAIJ() 24 $ and MatCreateMPIAIJ() 25 $ -mat_dense : dense type, uses MatCreateSequentialDense() 26 $ -mat_row : row type, uses MatCreateSequentialRow() 27 $ and MatCreateMPIRow() 28 $ -mat_rowbs : rowbs type (for parallel symmetric matrices only), 29 $ uses MatCreateMPIRowbs() 30 $ -mat_bdiag : block diagonal type, uses 31 $ MatCreateSequentialBDiag() and 32 $ MatCreateMPIBDiag() 33 $ 34 $ -mpi_objects : uses MPI matrix (parallel format), even for one processor 35 36 Notes: 37 The default matrix type is AIJ, using MatCreateSequentialAIJ() and 38 MatCreateMPIAIJ(). 39 40 .keywords: matrix, create, initial 41 42 .seealso: MatCreateSequentialAIJ((), MatCreateMPIAIJ(), 43 MatCreateSequentialRow(), MatCreateMPIRow(), 44 MatCreateSequentialBDiag(),MatCreateMPIBDiag(), 45 MatCreateSequentialDense(), MatCreateMPIRowbs(), MatConvert() 46 @*/ 47 int MatCreate(MPI_Comm comm,int m,int n,Mat *V) 48 { 49 int numtid; 50 MPI_Comm_size(comm,&numtid); 51 if (OptionsHasName(0,"-help")) { 52 MPIU_printf(comm,"MatCreate() options: -mat_dense, -mat_row -mat_rowbs\n"); 53 MPIU_printf(comm," -mat_bdiag, -mpi_objects\n"); 54 } 55 if (OptionsHasName(0,"-mat_dense")) { 56 return MatCreateSequentialDense(comm,m,n,V); 57 } 58 if (numtid > 1 || OptionsHasName(0,"-mpi_objects")) { 59 if (OptionsHasName(0,"-mat_row")) { 60 return MatCreateMPIRow(comm,PETSC_DECIDE,PETSC_DECIDE,m,n,5,0,0,0,V); 61 } 62 #if defined(HAVE_BLOCKSOLVE) && !defined(__cplusplus) 63 if (OptionsHasName(0,"-mat_rowbs")) { 64 return MatCreateMPIRowbs(comm,PETSC_DECIDE,m,5,0,0,V); 65 } 66 #endif 67 return MatCreateMPIAIJ(comm,PETSC_DECIDE,PETSC_DECIDE,m,n,5,0,0,0,V); 68 } 69 if (OptionsHasName(0,"-mat_row")) { 70 return MatCreateSequentialRow(comm,m,n,10,0,V); 71 } 72 if (OptionsHasName(0,"-mat_bdiag")) { 73 int nb = 1, ndiag = 0, ndiag2, *d, ierr; 74 OptionsGetInt(0,"-mat_bdiag_bsize",&nb); 75 OptionsGetInt(0,"-mat_bdiag_ndiag",&ndiag); 76 if (ndiag) { 77 d = (int *)MALLOC( ndiag * sizeof(int) ); CHKPTR(d); 78 ndiag2 = ndiag; 79 OptionsGetIntArray(0,"-mat_bdiag_dvals",d,&ndiag2); 80 if (ndiag2 != ndiag) { 81 SETERR(1,"Incompatible number of diagonals and diagonal values."); 82 } 83 } 84 else SETERR(1,"Must set diagonals before creating matrix."); 85 ierr = MatCreateSequentialBDiag(comm,m,n,ndiag,nb,d,0,V); 86 if (d) FREE(d); 87 return ierr; 88 } 89 return MatCreateSequentialAIJ(comm,m,n,10,0,V); 90 } 91 92