HB_TO_ST
Harwell-Boeing => Sparse Triplet Format

HB_TO_ST is an executable FORTRAN77 program, using double precision arithmetic, which reads the definition of a sparse matrix from a file in Harwell-Boeing format, and writes the information into a Sparse Triplet file.

Usage:

hb_to_st < hb.file > st.file

reads the sparse matrix information from the Harwell-Boeing file hb.file and writes it to the sparse triplet format file st.file.

Related Data and Programs:

CSPARSE is a set of C routines for the direct solution of sparse linear systems.

DLAP is a set of FORTRAN90 routines for solving sparse linear systems.

HB is a data directory which contains examples and a description of the Harwell-Boeing sparse matrix format.

HB_IO is a set of FORTRAN90 routines for reading and writing sparse linear systems stored in the Harwell-Boeing Sparse Matrix format.

HB_TO_MSM is a MATLAB routine which reads a Harwell-Boeing file describing a sparse matrix and defines a corresponding MATLAB sparse matrix.

MM_IO is a set of FORTRAN90 routines for reading and writing sparse linear systems stored in the Matrix Market format.

NSPCG is a library of FORTRAN90 routines for nonsymmetric preconditioned conjugate gradient methods applied to sparse matrices.

SPARSE is a built-in MATLAB function for defining sparse matrices.

SPARSEKIT is a library of FORTRAN90 routines by Yousef Saad for sparse matrix operations.

SPARSEPAK is a library of FORTRAN90 routines that form an obsolete version of the Waterloo Sparse Matrix Package.

ST is a data directory which contains examples and a description of the Sparse Triplet sparse matrix format.

Reference:

1. Timothy Davis,
   Direct Methods for Sparse Linear Systems,
   SIAM, Philadelphia, 2006.

Source Code:

• hb_to_st.f, the source code.
• hb_to_st.csh, commands to compile, link and load the source code.

Examples and Tests:

5BY5 is a simple 5 by 5 matrix:

        1.1  0.0  0.0  1.4  0.0
        0.0  2.2  0.0  0.0  0.0
        3.1  3.2  3.3  3.4  3.5
        0.0  0.0  0.0  4.4  4.5
        5.1  5.2  0.0  0.0  5.5
      

• 5by5_rua.hb, the Harwell-Boeing file containing the matrix.
• 5by5.st, is the corresponding sparse triple file;
• 5by5.out, is the printed output from the program.

KERSHAW is a simple 4 by 4 matrix:

         3  -2   0   2
        -2   3  -2   0
         0  -2   3  -2
         2   0  -2   3
      

• kershaw_rua.hb, the Harwell-Boeing file containing the matrix.
• kershaw.st, is the corresponding sparse triple file;
• kershaw.out, is the printed output from the program.

List of Routines:

• MAIN is the main program for HB_TO_ST.

You can go up one level to the FORTRAN77 source codes.