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## Copyright (C) 1996 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.
## usage: multiplot (xn, yn)
##
## Sets and resets multiplot mode
##
## If multiplot(0,0) then it will close multiplot mode and and if
## arguments are non-zero, then it will set up multiplot mode with
## xn,yn subplots along x and y axes.
##
## NOTE: this will work only with gnuplot installed with
## multiplot patch
## Author: Vinayak Dutt, Dutt.Vinayak@mayo.EDU
## Created: 3 July 95
## Adapted-By: jwe
function multiplot (xn, yn)
if (! gnuplot_has_multiplot)
error ("multiplot: gnuplot does not appear to support this feature");
endif
## 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__;
if (nargin != 2)
usage ("multiplot (xn, yn)");
endif
if (! (is_scalar (xn) && is_scalar (yn)))
error ("multiplot: xn and yn have to be scalars");
endif
xn = round (xn);
yn = round (yn);
if (xn == 0 && yn == 0)
oneplot ();
## XXX FIXME XXX -- do we really need to reset these here?
__multiplot_xsize__ = 1;
__multiplot_ysize__ = 1;
__multiplot_xn__ = 1;
__multiplot_yn__ = 1;
__multiplot_xi__ = 1;
__multiplot_yi__ = 1;
else
if (xn < 1 || yn < 1)
error ("multiplot: xn and yn have to be positive integers");
endif
gset multiplot;
xsize = 1.0 ./ xn;
ysize = 1.0 ./ yn;
eval (sprintf ("gset size %g, %g", xsize, ysize));
xo = 0.0;
yo = (yn - 1.0)*ysize;
eval (sprintf ("gset origin %g, %g", xo, yo));
__multiplot_mode__ = 1;
__multiplot_xsize__ = xsize;
__multiplot_ysize__ = ysize;
__multiplot_xn__ = xn;
__multiplot_yn__ = yn;
__multiplot_xi__ = 1;
__multiplot_yi__ = 1;
gnuplot_command_replot = "cle;rep";
clearplot;
endif
endfunction
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