mm_io, a FORTRAN77 code which reads and writes files in the Matrix Market (MM) format.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
mm_io is available in a C version and a Fortran90 version and a MATLAB version and an Octave version.
cc_io, a FORTRAN77 library which reads and writes sparse linear systems stored in the Compressed Column (CC) format.
dlap_io, a FORTRAN77 library which reads and writes files describing sparse matrices used by DLAP.
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).
MM, a data directory which contains a description and examples of the Matrix Market format for storing matrices.
SPARSE_DISPLAY, a FORTRAN77 library which can read information defining a matrix of numbers and display the sparsity pattern or location of the nonzero elements using gnuplot. This operation is already available in the built-in MATLAB "spy" command.
ST_IO, a FORTRAN77 library which reads and writes sparse linear systems stored in the Sparse Triplet (ST) format.
TEST_MAT, a FORTRAN77 library which defines various test matrices.