## Copyright (C) 2005 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.

## This is a script file shared by __plt__ and __errplot__.

## global variables to keep track of multiplot options

global __multiplot_mode__ = 0;
global __multiplot_xsize__;
global __multiplot_ysize__;
global __multiplot_xn__;
global __multiplot_yn__;
global __multiplot_xi__;
global __multiplot_yi__;
global __multiplot_scale__;

if (isempty (__multiplot_scale__))
  __multiplot_scale__ = [1, 1];
endif

if (isempty (__multiplot_xi__))
  __multiplot_xi__ = 1;
endif

if (isempty (__multiplot_yi__))
  __multiplot_yi__ = 1;
endif

global __current_figure__;
global __plot_data_offset__;
global __plot_command__;
global __plot_command_sep__;
global __plot_data__;

if (isempty (__current_figure__))
  __current_figure__ = 1;
endif

if (length (__plot_data_offset__) < __current_figure__
    || any (size (__plot_data_offset__{__current_figure__}) != [__multiplot_xi__, __multiplot_yi__]))

  __plot_data_offset__{__current_figure__}(__multiplot_xi__,__multiplot_yi__) = 1;
endif

if (length (__plot_command__) < __current_figure__
    || any (size (__plot_command__{__current_figure__}) != [__multiplot_xi__, __multiplot_yi__]))
  __plot_command__{__current_figure__}{__multiplot_xi__,__multiplot_yi__} = "";
endif

if (length (__plot_data__) < __current_figure__
    || any (size (__plot_data__{__current_figure__}) != [__multiplot_xi__, __multiplot_yi__]))
  __plot_data__{__current_figure__}{__multiplot_xi__,__multiplot_yi__} = [];
endif