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## Copyright (C) 1998-2003 Joao Cardoso.
##
## This program 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 of the License, or (at your
## option) any later version.
##
## This program 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.
##
## This file is part of plplot_octave.
## zoom(arg)
##
## Using the mouse iteratively select an area for setting the axis.
## If 'arg' == "off" set axis to "autoscale"
function zoom(arg)
global __pl
strm = __pl_init;
if (nargin == 1)
if (strcmp(arg, "off"))
axis;
return
endif
endif
[x1, y1, x2, y2] = plrb;
if (__pl.type(strm) == 10 || __pl.type(strm) == 30)
x1 = 10^x1; x1 = 10^x2;
endif
if (__pl.type(strm) == 20 || __pl.type(strm) == 30)
y1 = 10^y1; y2 = 10^y2;
endif
axis([min(x1, x2), max(x1, x2), min(y1, y2), max(y1, y2)]);
endfunction
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