ST_TO_DSP
Convert Sparse Matrix File from ST to DSP Format

ST_TO_DSP is a FORTRAN77 program which converts a sparse matrix file from the ST (zero-based index) to DSP (one-based-index) format.

Usage:

st_to_dsp file.st

reads the user's data file file.st, reads the data, and writes the converted data to file.dsp.

Licensing:

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

Languages:

ST_TO_DSP is available in a FORTRAN77 version and a FORTRAN90 version.

Related Data and Programs:

DSP, a file format which is used for the output of this program.

DSP_TO_ST, a FORTRAN77 program which converts a DSP sparse matrix file to ST format.

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

ST_IO, a FORTRAN77 library which reads and writes sparse linear systems stored in the ST "sparse triplet" Sparse Matrix format.

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

Source Code:

• st_to_dsp.f, the source code.
• st_to_dsp.sh, commands to compile, link and load the source code.

Examples and Tests:

The KERSHAW matrix is a 4 by 4 matrix. Files you may copy include:

• kershaw.st, the Kershaw matrix, stored in an ST format file.
• kershaw.dsp, the Kershaw matrix, stored in a DSP format file created by the command

  st_to_dsp kershaw.st.

List of Routines:

• MAIN is the main program for ST_TO_DSP.
• FILE_NAME_EXT_GET determines the "extension" of a file name.
• FILE_NAME_EXT_SWAP replaces the current "extension" of a file name.
• GET_UNIT returns a free FORTRAN unit number.
• S_INDEX_LAST_C finds the LAST occurrence of a given character.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

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