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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: axis ()
## axis ([xmin, xmax])
## axis ([xmin, xmax, ymin, ymax])
## axis ([xmin, xmax, ymin, ymax, zmin, zmax])
##
## Sets the axis limits.
##
## With no arguments, turns autoscaling on.
##
## If your plot is already drawn, then you need to REPLOT before
## the new axis limits will take effect.
## Author: jwe
function curr_axis = axis (ax)
## This may not be correct if someone has used the gnuplot interface
## directly...
global __current_axis__ = [-10, 10, -10, 10];
if (nargin > 1)
usage ("axis ([xmin, xmax, ymin, ymax, zmin, zmax])");
endif
if (nargin == 0)
gset autoscale;
curr_axis = __current_axis__;
elseif (is_vector (ax))
len = length (ax);
if (len != 2 && len != 4 && len != 6)
error ("axis: expecting vector with 2, 4, or 6 elements");
endif
__current_axis__ = reshape (ax, 1, len);
if (len > 1)
eval (sprintf ("gset xrange [%g:%g];", ax (1), ax (2)));
endif
if (len > 3)
eval (sprintf ("gset yrange [%g:%g];", ax (3), ax (4)));
endif
if (len > 5)
eval (sprintf ("gset zrange [%g:%g];", ax (5), ax (6)));
endif
else
error ("axis: expecting no args, or a vector with 2, 4, or 6 elements");
endif
endfunction
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