## Copyright (C) 1996, 1997 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
## 02110-1301, USA.

## -*- texinfo -*-
## @deftypefn {Function File} {} __plt2mm__ (@var{h}, @var{x}, @var{y}, @var{fmt}, @var{key})
## @end deftypefn

## Author: jwe

function __plt2mm__ (h, x, y, fmt, key)

  if (nargin < 3 || nargin > 5)
    print_usage ();
  endif

  if (nargin < 4 || isempty (fmt))
    fmt = {""};
  endif

  if (nargin < 5 || isempty (key))
    key = {""};
  endif

  [x_nr, x_nc] = size (x);
  [y_nr, y_nc] = size (y);

  k = 1;
  fmt_nr = rows (fmt);
  if (x_nr == y_nr && x_nc == y_nc)
    if (x_nc > 0)
      if (rows (fmt) == 1)
	fmt = repmat (fmt, x_nc, 1);
      endif
      if (rows (key) == 1)
	key = repmat (key, x_nc, 1);
      endif
      for i = 1:x_nc
	## FIXME -- need to handle labels and line format.
	tkey = key{i};
	if (! isempty (tkey))
	  set (h, "key", "on");
	endif
	line (x(:,i), y(:,i), "keylabel", tkey);
      endfor
    else
      error ("__plt2mm__: arguments must be a matrices");
    endif
  else
    error ("__plt2mm__: matrix dimensions must match");
  endif

endfunction