new file mode 100644
--- /dev/null
+++ b/scripts/control/util/strappend.m
@@ -0,0 +1,39 @@
+## Copyright (C) 1998 Auburn University.  All rights reserved.
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by the
+## Free Software Foundation; either version 2, or (at your option) any
+## later version.
+##
+## Octave is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+## for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, write to the Free
+## Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.
+
+## retval = strappend(strlist,suffix);
+## append string suffix to each string in the list of strings strlist
+
+function retval = strappend (strlist, suffix);
+
+  if(nargin != 2 | nargout > 1)
+    usage(" retval = strappend(strlist,suffix)");
+  elseif(!is_signal_list(strlist))
+    strlist
+    error("strlist must be a list of strings (see is_signal_list)");
+  elseif(!(isstr(suffix) & rows(suffix) == 1))
+    suffix
+    error("suffix must be a single string");
+  endif
+
+  retval = list();
+  for ii=1:length(strlist)
+    retval(ii) = sprintf("%s%s",nth(strlist,ii),suffix);
+  endfor
+
+endfunction