UFget: MATLAB interface to the UF sparse matrix collection

Downloads sparse matrices from the web directly into the MATLAB workspace, from a vast range of real

Description

UFget is a MATLAB interface to 1877 sparse matrices (as of Nov 2007) for a wide range of applications, in the UF sparse matrix collection (http://www.cise.ufl.edu/research/sparse/matrices).

Problem = UFget ('HB/arc130'), for example, downloads the matrix of that name. An index is available, making it simple to write an M-file that (for example), downloads all symmetric positive definite matrices one at a time, sorted by the number of nonzeros in the Cholesky factorization after a minimum degree (AMD) ordering.

UFweb ('HB/arc130') opens the web page for the same matrix.

NOTE: tested on 32-bit and 64-bit Linux, and 32bit Windows. Untested on Windows64; if you try it there, please let me know how it works. It should be fine.

MATLAB 7.0 or later is required because of the MAT-file format the matrices are stored in.

• MATLAB release: MATLAB 7.5 (R2007b)
• Other requirements: MATLAB 7.0 or later is required (the *.mat files cannot be read by earlier versions).