mm_io

mm_io, an Octave code which reads and writes files in the Matrix Market (MM) file format.

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

mm_io is available in a C version and a Fortran90 version and a MATLAB version and an Octave version.

Related Data and Programs:

ccs_io, an Octave code which reads and writes sparse linear systems stored in the Compressed Column Storage (CCS) format.

dlap_io, an Octave code which reads and writes DLAP sparse matrix files;

hb_io, an Octave code which reads and writes sparse matrices stored in the Harwell-Boeing format.

mm, a data directory which contains a description and examples of the Matrix Market format for storing matrices.

mm_io_test

mm_to_msm, an Octave code which reads a Matrix Market file defining a sparse matrix, and creates a corresponding MATLAB sparse matrix data structure.

mm_to_st, an Octave code which reads the sparse matrix information from an MM Matrix Market file and writes a corresponding ST Sparse Triplet file.

msm_to_mm, an Octave code which writes a MATLAB sparse matrix to a Matrix Market file;

st_to_mm, an Octave code which converts a sparse matrix file from ST format to MM format (Matrix Market format);

test_mat, an Octave code which defines various test matrices.

Reference:

1. Ronald Boisvert, Roldan Pozo, Karin Remington,
   The Matrix Market Exchange Formats: Initial Design,
   National Institute of Standards and Technology,
   NISTIR 5935, December 1996

Source Code:

• ch_cap.m capitalizes a single character.
• mm_comment_print.m prints a comment line from a Matrix Market file.
• mm_comment_write.m writes a comment line to a Matrix Market file.
• mm_file_read.m reads an entire Matrix Market file.
• mm_file_write.m writes an entire Matrix Market file.
• mm_header_check.m checks the header information of a Matrix Market file.
• mm_header_print.m prints header information from a Matrix Market file.
• mm_header_read.m reads the header information from a Matrix Market file.
• mm_header_write.m writes the header information to a Matrix Market file.
• mm_nnz_set.m sets the value of NNZ in certain cases.
• mm_size_print.m prints size information from a Matrix Market file.
• mm_size_read_file.m reads the size information from a Matrix Market file.
• mm_size_read_string.m reads the size information from a string that has been read from a Matrix Market file.
• mm_size_write.m writes the size information to a Matrix Market file.
• mm_values_print.m prints the matrix value information from a Matrix Market file.
• mm_values_print_some.m prints some of the matrix value information from a Matrix Market file.
• mm_values_read.m reads the matrix value information from a Matrix Market file.
• mm_values_write.m writes the size information to a Matrix Market file.
• r8_to_c8.m constructs a C8 from two R8's.
• s_eqi.m is TRUE if two strings are equal, ignoring case and trailing blanks.
• s_len_trim.m returns the length of a string to the last nonblank.
• s_neqi.m is TRUE if two strings are not equal, ignoring case and trailing blanks.