Index: trace.m
===================================================================
RCS file: /cvs/octave/scripts/linear-algebra/trace.m,v
retrieving revision 1.19
diff --unified -r1.19 trace.m
--- trace.m	24 Jan 2008 07:40:58 -0000	1.19
+++ trace.m	24 Jan 2008 11:30:54 -0000
@@ -45,6 +45,9 @@
 %!assert(trace ([1, 2; 3, 4]) == 5);
 %!assert(trace ([1, 2; 3, 4; 5, 6]) == 5);
 %!assert(trace ([1, 3, 5; 2, 4, 6]) == 5);
+%!assert(trace ([]), 0);
+%!assert(trace (randn(1,0)), 0);
+%!
 %!error trace ();
 %!error trace (1, 2);
-
+%!error <only valid on 2-D objects> trace(reshape(1:9,[1,3,3]));