Implement diag + sparse, diag - sparse, sparse + diag, sparse - diag. Date: Mon, 9 Mar 2009 17:45:22 -0400 This does not use the typical sparse-mx-ops generator. I suspect the sematics of elementwise multiplication and division to be rather controversial, so they are not included. If comparison operations are added, the implementation should be shifted over to use the typical generator. The template in Sparse-diag-op-defs.h likely could use const bools rather than functional argument operations. I haven't measured which is optimized more effectively. Also, the Octave binding layer in op-dm-scm.cc likely could use all sorts of macro or template trickery, but it's far easier to let Emacs handle it for now. That would be worth revisiting if further elementwise sparse and diagonal operations are added.

--- a/test/ChangeLog	Mon Mar 09 17:49:14 2009 -0400
+++ b/test/ChangeLog	Mon Mar 09 17:49:14 2009 -0400
@@ -6,6 +6,10 @@
 
 	* test_diag_perm.m: Add a test for conversion to sparse form.
 
+2009-03-09  Jason Riedy  <jason@acm.org>
+
+	* test_diag_perm.m: Add tests for diag + sparse.
+
 2009-03-08  Jason Riedy  <jason@acm.org>
 
 	* test_diag_perm.m: Add tests for inverse scaling and sparse structure.