## 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} {} mplot (@var{x}, @var{y})
## @deftypefnx {Function File} {} mplot (@var{x}, @var{y}, @var{fmt})
## @deftypefnx {Function File} {} mplot (@var{x1}, @var{y1}, @var{x2}, @var{y2})
## This is a modified version of the @code{plot} function that works with
## the multiplot version of @code{gnuplot} to plot multiple plots per page.
## This plot version automatically advances to the next subplot position
## after each set of arguments are processed.
##
## See the description of the @var{plot} function for the various options.
## @end deftypefn

## Author: Vinayak Dutt <Dutt.Vinayak@mayo.EDU>
## Adapted-By: jwe

function mplot (varargin)

  __plot_globals__;

  cf = __current_figure__;

  __gnuplot_raw__ ("set nologscale;\n");
  __gnuplot_raw__ ("set nopolar;\n");

  __plt__ ("plot", varargin{:});

  ## update the plot position

  if (__multiplot_mode__(cf))

    if (__multiplot_xi__(cf) < __multiplot_xn__(cf))
      __multiplot_xi__(cf)++;
    else
      __multiplot_xi__(cf) = 1;
      if (__multiplot_yi__(cf) < __multiplot_yn__(cf))
        __multiplot_yi__(cf)++;
      else
        __multiplot_yi__(cf) = 1;
      endif
    endif

    xo = (__multiplot_xi__(cf) - 1.0) * __multiplot_xsize__(cf);
    yo = (__multiplot_yn__(cf) - __multiplot_yi__(cf)) * __multiplot_ysize__(cf);

    __gnuplot_raw__ (sprintf ("set origin %g, %g;\n", xo, yo));

  endif

endfunction