RUAFormat

Full name Microsoft.VisualBasic.Math.Matrix.MatrixMarket.RUAFormat Assembly Microsoft.VisualBasic.Math.Matrix Members 5

Reader and writer for the Harwell-Boeing sparse matrix format, specifically the RUA (Real, Unsymmetric, Assembled) variant.

The file is text based and uses a fixed column width layout:

Line 1 : 72 chars title + 8 chars identifier
Line 2 : totcrd ptrcrd indcrd valcrd rhscrd (5 integers)
Line 3 : mxtype(14) N M nz nrhs
Line 4 : (ptrfmt) (indfmt) (valfmt)
ptrcrd lines : column pointers (N + 1 integers, N = #columns)
indcrd lines : row indices (nz integers)
valcrd lines : numerical values (nz reals)

The stored matrix is column oriented (CSC). The internal SparseMatrix representation is row oriented (CSR), so a transposed index mapping is applied on both read and write.

01 Syntax

Microsoft.VisualBasic.Math.Matrix.MatrixMarket.RUAFormat

02 Methods

Name	Overloads	Summary
ReadIntegers	1	Reads fixed width integer fields from count lines, each holding perLine fields of width characters, and returns exactly expected values.
ReadReals	1	Reads fixed width real fields from count lines, each holding perLine fields of width characters, and returns exactly expected values.
FormatE20_12	1	Formats a double the way a Fortran E20.12 field would: 12 decimal digits, a 2 digit exponent, left padded to 20 columns.

03 Fields

Name	Overloads	Summary
MatrixType	2	The matrix type identifier that is written into the header.

04 Members

method ReadIntegers #

ReadIntegers(StreamReader, Int32, Int32, Int32, Int32)

Reads fixed width integer fields from count lines, each holding perLine fields of width characters, and returns exactly expected values.

method ReadReals #

ReadReals(StreamReader, Int32, Int32, Int32, Int32)

Reads fixed width real fields from count lines, each holding perLine fields of width characters, and returns exactly expected values.

method FormatE20_12 #

FormatE20_12(Double)

Formats a double the way a Fortran E20.12 field would: 12 decimal digits, a 2 digit exponent, left padded to 20 columns.

field MatrixType #

MatrixType

The matrix type identifier that is written into the header.

field MatrixType #

MatrixType