--- ismember.m.orig	2009-10-16 10:33:32.000000000 +0200
+++ ismember.m	2009-10-16 10:27:54.000000000 +0200
@@ -95,6 +95,12 @@
             endif
           endfor
           tf = logical (a_idx);
+	elseif (strcmpi (rows_opt, "rows") && isempty(s))
+	  tf = false(size(a,1),1);
+	  a_idx = false(size(a,1),1);
+	elseif (strcmpi (rows_opt, "rows") && isempty(a))
+	  tf = zeros(0,1);
+	  a_idx = zeros(0,1);
         elseif (strcmpi (rows_opt, "rows"))
           error ("ismember: with 'rows' both sets must be matrices with an equal number of columns"); 
         else