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+# Copyright (C) 1995 John W. Eaton
+# 
+# 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
+# 02111-1307, USA. 
+
+function subwindow (xn, yn)
+
+# usage: subwindow (xn, yn)
+#
+# NOTE: this will work only with gnuplot installed with
+#       multiplot patch
+#
+# Sets subwindow position in multiplot mode for next plot. The
+# multiplot mode has to be previously initialized using multiplot()
+# command, else this command just becomes an aliad to multiplot()
+
+# Written by Vinayak Dutt, Dutt.Vinayak@mayo.EDU  3 Jul 95 
+
+# global variables to keep track of multiplot options
+
+  global multiplot_mode 
+  global multi_xsize multi_ysize 
+  global multi_xn multi_yn
+
+# check calling argument count
+
+  if (nargin != 2)
+    usage ("subwindow (xn, yn)");
+  endif
+
+# check for scalar inputs
+
+  if (! (is_scalar (xn) && is_scalar (yn)))
+    error ("subwindow: xn and yn have to be scalars");
+  endif
+
+  xn = round (xn);
+  yn = round (yn);
+
+# switch to multiplot mode if not already in, and use the args as the
+# args to multiplot() 
+
+  if (multiplot_mode != 1)
+    multiplot (xn, yn)
+    return;
+  endif
+
+# get the sub plot location
+
+  if (xn < 1 || xn > multi_xn || yn < 1 || yn > multi_yn)
+    error ("subwindow: incorrect xn and yn");
+  endif
+
+  xo = (xn - 1.0)*multi_xsize;
+  yo = (multi_yn - yn)*multi_ysize;
+
+  eval (sprintf ("set origin %g, %g", xo, yo));
+
+endfunction