HBRead HBRead1 HBReadInfo HBReadInfo1 HBWrite HBWrite1 MMRead MMReadInfo MMWrite ReadGmsh22 ReadMesh ReadMsh2 ReadMsh3 WriteCsv2 WriteCsv3 WriteGmsh22 WriteVtkUg ZHBRead ZHBRead1 ZHBWrite ZHBWrite1 ZMMRead ZMMWrite

HBRead1() Sub HBRead1 ( Fname As  String, Title As  String, Key As  String, Nrow As  Long, Ncol As  Long, Nnz As  Long, Val() As  Double, Ptr() As  Long, Ind() As  Long, DataType As  Long, MatShape As  Long, MatForm As  Long, Optional Info As  Long, Optional Nrhs As  Long, Optional Base As  Long = 0, Optional Format As  Long = 0, Optional Sort As  Long = 0  ) Read a matrix from the Harwell-Boeing file (Simple driver) Purpose This routine reads a sparse matrix from the file in Harwell-Boeing format. The matrix data is stored in the array as it is without checking the contents such as the order. Sparse matrices are stored in CSR, CSC or COO format. However, it is possible to sort sparse matrix elements in ascending order of column or row number within each row or column by option. RHS (including initial guess and exact solution) is not read. Nrhs, however, is returned through optional parameter. Parameters [in] Fname Input file name. [out] Title Title string. [out] Key Key string. [out] Nrow Number of rows of the matrix. [out] Ncol Number of columns of the matrix. [out] Nnz Number of non-zero elements. [out] Val() Array Val(LVal - 1) (LVal >= Nnz) Nonzero elements of sparse matrix. [out] Ptr() Array Ptr(LPtr - 1) (LPtr >= Nrow + 1 (CSR), LPtr >= Ncol + 1 (CSC) or LPtr >= Nnz (COO)) Row pointers (if CSR), column pointers (if CSC), or row indices (if COO). [out] Ind() Array Ind(LInd - 1) (LInd >= Nnz) Column indices (if CSR or COO) or row indices (if CSC). [out] DataType Data type of the matrix. = 0: Real. = 2: Pattern. [out] MatShape Matrix shape. = 0: Unsymmetric. = 1: Symmetric. = 2: Skew-symmetric. = 4: Rectangular. [out] MatForm Storage format of the matrix. = 0: Sparse matrix. [out] Info (Optional) = 0: Successful exit. < 0: The (-Info)-th argument is invalid. = 1: Could not open file. = 3: File read error. = 4: Invalid read format. = 5: Memory error. [out] Nrhs (Optional) Number of columns of RHS matrix. [in] Base (Optional) Index style of Ptr and Ind. (default = 0) = 0: Zero-based (C style) indexing: Starting index is 0. = 1: One-based (Fortran style) indexing: Starting index is 1. [in] Format (Optional) Sparse matrix format. (default = 0) = 0: CSR format. = 1: CSC format. = 2: COO format. [in] Sort (Optional) Specify whether to sort elements of sparse matrix in ascending order of column number within each row (if CSR) or row number within each column (if CSC). (default = 0) = 0: Do not sort elements. = 1: Sort elements. Example Program Reads the following file (Test_HBWrite1.rua) in Harwell-Boeing format. Test HBWrite1 Key 6 1 2 3 0 RUA 3 3 9 0 (8I10) (8I10) (3D23.15) (3D23.15) 1 4 7 10 1 2 3 1 2 3 1 2 3 2.000000000000000e-01 -3.200000000000000e-01 -8.000000000000000e-01 -1.100000000000000e-01 8.100000000000001e-01 -9.200000000000000e-01 -9.300000000000000e-01 3.700000000000000e-01 -2.900000000000000e-01 Sub Ex_HBRead1() Dim Title As String, Key As String Dim M As Long, N As Long, Nnz As Long, DataType As Long, MatShape As Long, MatForm As Long Dim A(8) As Double, Ia(3) As Long, Ja(8) As Long Dim Info As Long Call HBRead1("Test_HBWrite1.rua", Title, Key, M, N, Nnz, A(), Ia(), Ja(), DataType, MatShape, MatForm, Info) Debug.Print "HBRead1: Info =" + Str(Info) Debug.Print "Title = """ + Title + """, Key = """ + Key + """, M =" + Str(M) + ", N =" + Str(N) + ", Nnz =" + Str(Nnz) Debug.Print "DataType =" + Str(DataType) + ", MatShape =" + Str(MatShape) + ", MatForm =" + Str(MatForm) Debug.Print A(0), A(1), A(2), A(3), A(4), A(5), A(6), A(7), A(8) Debug.Print Ia(0), Ia(1), Ia(2), Ia(3) Debug.Print Ja(0), Ja(1), Ja(2), Ja(3), Ja(4), Ja(5), Ja(6), Ja(7), Ja(8) End Sub Example Results HBRead1: Info = 0 Title = "Test HBWrite1", Key = "Key", M = 3, N = 3, Nnz = 9 DataType = 0, MatShape = 0, MatForm = 0 0.2 -0.11 -0.93 -0.32 0.81 0.37 -0.8 -0.92 -0.29 0 3 6 9 0 1 2 0 1 2 0 1 2