Mercurial > octave
view scripts/plot/draw/semilogx.m @ 31706:597f3ee61a48 stable
update Octave Project Developers copyright for the new year
author | John W. Eaton <jwe@octave.org> |
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date | Fri, 06 Jan 2023 13:11:27 -0500 |
parents | 796f54d4ddbf |
children | 2e484f9f1f18 |
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######################################################################## ## ## Copyright (C) 1993-2023 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## 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 {} {} semilogx (@var{y}) ## @deftypefnx {} {} semilogx (@var{x}, @var{y}) ## @deftypefnx {} {} semilogx (@var{x}, @var{y}, @var{property}, @var{value}, @dots{}) ## @deftypefnx {} {} semilogx (@var{x}, @var{y}, @var{fmt}) ## @deftypefnx {} {} semilogx (@var{hax}, @dots{}) ## @deftypefnx {} {@var{h} =} semilogx (@dots{}) ## Produce a 2-D plot using a logarithmic scale for the x-axis. ## ## See the documentation of @code{plot} for a description of the ## arguments that @code{semilogx} 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, semilogy, loglog} ## @end deftypefn function h = semilogx (varargin) [hax, varargin, nargs] = __plt_get_axis_arg__ ("semilogx", 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"); if (! ishold ()) set (hax, "xminortick", "on", "box", "on"); endif htmp = __plt__ ("semilogx", 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; %! x = 1:0.01:10; %! y = (x .* (1 + rand (size (x)))) .^ 2; %! semilogx (y, x); %! title ({"semilogx() plot", "X-axis is logarithmic"}); %!demo %! clf; %! x = logspace (-5, 1, 10); %! y = logspace (-5, 1, 10); %! %! subplot (1,2,1); %! semilogx (x, y); %! title ("semilogx (x, y)"); %! %! subplot (1,2,2); %! semilogx (-x, y); %! title ("semilogx (-x, y)"); %!demo %! clf; %! x = logspace (-5, 1, 10); %! y = logspace (-5, 1, 10); %! %! subplot (1,2,1); %! semilogx (x, y); %! set (gca, "xdir", "reverse", "positionconstraint", "outerposition"); %! title ({"semilogx (x, y)", "xdir = reversed"}); %! %! subplot (1,2,2); %! semilogx (-x, y); %! set (gca, "xdir", "reverse", "positionconstraint", "outerposition"); %! title ({"semilogx (-x, y)", "xdir = reversed"}); %!test %! hf = figure ("visible", "off"); %! unwind_protect %! a = logspace (-5, 1, 10); %! b = logspace (-5, 1, 10); %! semilogx (a, b); %! assert (get (gca, "xscale"), "log"); %! assert (get (gca, "yscale"), "linear"); %! 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); %! semilogx (a, b); %! axis tight; %! assert (all (get (gca, "xtick") < 0)); %! unwind_protect_cleanup %! close (hf); %! end_unwind_protect