Mercurial > octave
view scripts/plot/draw/loglog.m @ 25054:6652d3823428 stable
maint: Update copyright dates in all source files.
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 30 Mar 2018 09:19:05 -0400 |
parents | 194eb4bd202b |
children | 00f796120a6d |
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## Copyright (C) 1993-2018 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 3 of the License, 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, see ## <https://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {} {} loglog (@var{y}) ## @deftypefnx {} {} loglog (@var{x}, @var{y}) ## @deftypefnx {} {} loglog (@var{x}, @var{y}, @var{prop}, @var{value}, @dots{}) ## @deftypefnx {} {} loglog (@var{x}, @var{y}, @var{fmt}) ## @deftypefnx {} {} loglog (@var{hax}, @dots{}) ## @deftypefnx {} {@var{h} =} loglog (@dots{}) ## Produce a 2-D plot using logarithmic scales for both axes. ## ## See the documentation of @code{plot} for a description of the arguments ## that @code{loglog} will accept. ## ## If the first argument @var{hax} is an axes handle, then plot into this axes, ## rather than the current axes returned by @code{gca}. ## ## The optional return value @var{h} is a graphics handle to the created plot. ## @seealso{plot, semilogx, semilogy} ## @end deftypefn ## Author: jwe function h = loglog (varargin) [hax, varargin, nargs] = __plt_get_axis_arg__ ("loglog", varargin{:}); if (nargs < 1) print_usage (); endif oldfig = []; if (! isempty (hax)) oldfig = get (0, "currentfigure"); endif unwind_protect hax = newplot (hax); set (hax, "xscale", "log", "yscale", "log"); if (! ishold ()) set (hax, "xminortick", "on", "yminortick", "on", "box", "on"); endif htmp = __plt__ ("loglog", hax, varargin{:}); unwind_protect_cleanup if (! isempty (oldfig)) set (0, "currentfigure", oldfig); endif end_unwind_protect if (nargout > 0) h = htmp; endif endfunction %!demo %! clf; %! t = 1:0.01:10; %! x = sort ((t .* (1 + rand (size (t)))) .^ 2); %! y = (t .* (1 + rand (size (t)))) .^ 2; %! loglog (x, y); %! title ({"loglog() plot", "Both axes are logarithmic"}); %!demo %! clf; %! a = logspace (-5, 1, 10); %! b =-logspace (-5, 1, 10); %! %! subplot (1,2,1); %! loglog (a, b); %! title ("loglog (a, b)"); %! %! subplot (1,2,2); %! loglog (a, abs (b)); %! set (gca, "ydir", "reverse"); %! title ("loglog (a, abs (b))"); %!test %! hf = figure ("visible", "off"); %! unwind_protect %! a = logspace (-5, 1, 10); %! b = logspace (-5, 1, 10); %! loglog (a, b); %! assert (get (gca, "yscale"), "log"); %! assert (get (gca, "xscale"), "log"); %! unwind_protect_cleanup %! close (hf); %! end_unwind_protect %!test %! hf = figure ("visible", "off"); %! unwind_protect %! a = logspace (-5, 1, 10); %! b =-logspace (-5, 1, 10); %! loglog (a, b); %! axis tight; %! assert (all (get (gca, "ytick") < 0)); %! unwind_protect_cleanup %! close (hf); %! end_unwind_protect