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.

--- a/src/Makefile.in	Thu Mar 12 17:08:14 2009 -0400
+++ b/src/Makefile.in	Mon Mar 09 17:49:13 2009 -0400
@@ -166,7 +166,7 @@
 DIAG_OP_XSRC := op-cdm-cdm.cc op-cdm-cm.cc op-cdm-cs.cc op-cdm-dm.cc \
 	op-cdm-m.cc op-cdm-s.cc op-cm-cdm.cc op-cm-dm.cc op-dm-cdm.cc \
 	op-dm-cm.cc op-dm-cs.cc op-dm-dm.cc op-dm-m.cc op-dm-s.cc \
-	op-m-cdm.cc op-m-dm.cc
+	op-m-cdm.cc op-m-dm.cc op-dm-sm.cc op-dm-scm.cc
 
 FDIAG_OP_XSRC := op-fcdm-fcdm.cc op-fcdm-fcm.cc op-fcdm-fcs.cc op-fcdm-fdm.cc \
 	op-fcdm-fm.cc op-fcdm-fs.cc op-fcm-fcdm.cc op-fcm-fdm.cc \