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axis.m
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1996-09-28
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# Copyright (C) 1993, 1994, 1995 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, 675 Mass Ave, Cambridge, MA 02139, USA.
function axis (ax)
# 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.
if (nargin > 1)
usage ("axis ([xmin, xmax, ymin, ymax, zmin, zmax])");
endif
if (nargin == 0)
set autoscale;
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
if (len > 1)
eval (sprintf ("set xrange [%g:%g];", ax (1), ax (2)));
endif
if (len > 3)
eval (sprintf ("set yrange [%g:%g];", ax (3), ax (4)));
endif
if (len > 5)
eval (sprintf ("set 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