MatrixMarket Notes

Under S3L_SPARSE_COO format, S3L_read_sparse can also read data supplied in either of two Coordinate formats distributed by MatrixMarket (http://gams.nist.gov/MatrixMarket/). The two supported MatrixMarket formats are real general and complex general.

MatrixMarket files always use one-based indexing. Consequently, they can only be used directly by Fortran programs, which also implement one-based indexing. For a C or C++ program to use a MatrixMarket file, it must call the F77 application program interface. The program example ex_sparse.c illustrates an F77 call from a C program. See the Examples section for the path to this sample program.