Implement sparse * diagonal and diagonal * sparse operations, double-prec only. Date: Sun, 8 Mar 2009 16:28:18 -0400 These preserve sparsity, so eye(5) * sprand (5, 5, .2) is *sparse* and not dense. This may affect people who use multiplication by eye() rather than full(). The liboctave routines do *not* check if arguments are scalars in disguise. There is a type problem with checking at that level. I suspect we want diag * "sparse scalar" to stay diagonal, but we have to return a sparse matrix at the liboctave. Rather than worrying about that in liboctave, we cope with it when binding to Octave and return the correct higher-level type. The implementation is in Sparse-diag-op-defs.h rather than Sparse-op-defs.h to limit recompilation. And the implementations are templates rather than macros to produce better compiler errors and debugging information.

Wayne Bequette <bequette@bequette.che.rpi.edu>
Michel Berkelaar <michel@es.ele.tue.nl>
Larry Biegler <biegler@cmu.edu>
Yuris Fuentes <yuris@matias.colorado.edu>
Jeff Kantor <jeffrey.kantor@nd.edu>
Keith Levien <levienk@ccmail.orst.edu>
Danny Lewin <cerdldl@technion.technion.ac.il>
Michael Liebman <mjliebman@amoco.com>
Wolfgang Marquardt <maq@Prandtl.lfpt.rwth-aachen.de>
Buff Miner <miner@hagar.ph.utexas.edu>
Ashutosh Patwardhan <ashu@shell.com>
Larry Ricker <ricker@chevax.cheme.washington.edu>