ReadHBSparse — read a Harwell-Boeing sparse format file
[A, description, ref, mtype] = ReadHBSparse([filename])
(optional) a string given the filename (eventually preceeding by the path), if filename is not given then the function use uigetfile to get filename interactively
the sparse matrix
a string given some information about the matrix
a string given the reference of the matrix
a string given the type of the matrix
An utility to read the Harwell-Boeing sparse matrix format. Currently don't work for unassembled matrix. Also the eventual rhs vectors of the file are not returned. Generally the file name is of the form ref.mtype where mtype is a 3 letters word abc given some information (already inside the file) on the matrix :
a = R|C|P for real|complex|pattern (no values given)
b = S|H|Z|U for symmetric|hermitian|skew symmetric|asymmetric
c = A|E for assembled|unassembled matrix
(case E is not treated by this func)
Users' Guide for the Harwell-Boeing Sparse Matrix Collection Iain S. Duff, Roger G. Grimes, John G. Lewis. You may found this guide and numerous sparse matrices (in the Harwell-Boeing format) at the University of Florida Sparse Matrix Collection
web site : http://www.cise.ufl.edu/research/sparse/matrices/
maintained by Tim Davis (http://www.cise.ufl.edu/~davis/)