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/test/ChangeLog	Thu Mar 12 17:08:14 2009 -0400
+++ b/test/ChangeLog	Mon Mar 09 17:49:13 2009 -0400
@@ -6,6 +6,10 @@
 
 	* test_diag_perm.m: Add a test for conversion to sparse form.
 
+2009-03-08  Jason Riedy  <jason@acm.org>
+
+	* test_diag_perm.m: Add tests for preserving sparse structure when scaling.
+
 2009-02-25  John W. Eaton  <jwe@octave.org>
 
 	* build_sparse_tests.sh: Note that saving sparse matrices to MAT