ST_IO
Read and Write Sparse Triplet (ST) Matrix Files.

ST_IO is a FORTRAN77 library which reads and writes files in the Sparse Triplet (ST) format used for storing sparse matrices.

Licensing:

The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.

Languages:

ST_IO is available in a C version and a C++ version and a FORTRAN90 version and a FORTRAN77 version and a MATLAB version and a Python version.

Related Data and Programs:

CC_IO, a FORTRAN77 library which reads and writes sparse linear systems stored in the Compressed Column (CC) format.

CC_TO_ST, a FORTRAN77 library which converts a sparse matrix from compressed column (CC) to sparse triple (ST) format.

HB_READ, a FORTRAN77 library which reads files in the Harwell Boeing (HB) sparse matrix format; This is a simplified interface intended to handle only the most common format, complex unsymmetric assembled (CUA) or real unsymmetric assembled (RUA).

HB_TO_ST, a FORTRAN77 program which converts a sparse matrix from Harwell Boeing (HB) to Sparse Triplet (ST) format.

MM_IO, a FORTRAN77 library which reads and writes sparse linear systems stored in the Matrix Market (MM) format.

ST, the format which is used for the input to this program.

ST_TO_CC, a FORTRAN77 library which converts sparse matrix data from Sparse Triplet (ST) format to Compressed Column (CC) format.

ST_TO_HB, a FORTRAN90 program which converts a sparse matrix file from Sparse Triplet (ST) format to Harwell Boeing (HB) format;

Source Code:

• st_io.f, the source code.
• st_io.sh, commands to compile the source code.

Examples and Tests:

• st_io_prb.f, a sample calling program.
• st_io_prb.sh, commands to compile and run the sample program.
• st_io_prb_output.txt, the output file.
• a5by5.st, an ST file storing a 5 by 5 matrix.
• kershaw.st, an ST file storing a 4 by 4 matrix.

List of Routines:

• GET_UNIT returns a free FORTRAN unit number.
• SORT_HEAP_EXTERNAL externally sorts a list of items into ascending order.
• ST_DATA_PRINT prints the data in an ST file.
• ST_DATA_PRINT_SOME prints some of the data in an ST file.
• ST_DATA_READ reads the data of an ST file.
• ST_DATA_WRITE writes the data of an ST file.
• ST_HEADER_PRINT prints the header of an ST file.
• ST_HEADER_READ reads the header of an ST file.
• ST_HEADER_WRITE writes the header of an ST file.
• ST_REBASE changes the base of an index array.
• ST_SORT_A sorts the entries of an ST matrix by column.
• ST_TRANSPOSE transposes an ST matrix.
• TIMESTAMP prints out the current YMDHMS date as a timestamp.

You can go up one level to the FORTRAN90 source codes.