Mercurial > octave
view scripts/plot/draw/comet.m @ 32062:ada96a467a28
quiver: Improve plotting with non-float numeric inputs (bug #59695)
* scripts/plot/draw/private/__quiver__.m: Change firstnonnumeric check to look
for char instead of numeric to allow for logical inputs. Recast all inputs
up to firstnonnumeric as doubles. Check if firstnonnumeric element is 'off'
and if so set scale factor to 0 and increment firstnonnumeric.
* scripts/plot/draw/quiver.m: Update docstring to include scaling factor
option 'off'. Add BIST for int and logical input types.
* scripts/plot/draw/quiver3.m: Update docstring to include scaling factor
option 'off'. Add BISTs for too-few inputs.
* etc/NEWS.9.md: Appended details of changes to quiver note under General
Improvements and noted it also applies to quiver3.
author | Nicholas R. Jankowski <jankowski.nicholas@gmail.com> |
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date | Wed, 26 Apr 2023 17:18:50 -0400 |
parents | 597f3ee61a48 |
children | 2e484f9f1f18 |
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######################################################################## ## ## Copyright (C) 2008-2023 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 {} {} comet (@var{y}) ## @deftypefnx {} {} comet (@var{x}, @var{y}) ## @deftypefnx {} {} comet (@var{x}, @var{y}, @var{p}) ## @deftypefnx {} {} comet (@var{hax}, @dots{}) ## Produce a simple comet style animation along the trajectory provided by ## the input coordinate vectors (@var{x}, @var{y}). ## ## If @var{x} is not specified it defaults to the indices of @var{y}. ## ## The speed of the comet may be controlled by @var{p}, which represents the ## time each point is displayed before moving to the next one. The default for ## @var{p} is @code{5 / numel (@var{y})}. ## ## If the first argument @var{hax} is an axes handle, then plot into this axes, ## rather than the current axes returned by @code{gca}. ## @seealso{comet3} ## @end deftypefn function comet (varargin) [hax, varargin, nargin] = __plt_get_axis_arg__ ("comet", varargin{:}); if (nargin == 0 || nargin > 3) print_usage (); endif if (nargin == 1) y = varargin{1}; x = 1:numel (y); p = 5 / numel (y); elseif (nargin == 2) x = varargin{1}; y = varargin{2}; p = 5 / numel (y); elseif (nargin == 3) x = varargin{1}; y = varargin{2}; p = varargin{3}; endif oldfig = []; if (! isempty (hax)) oldfig = get (0, "currentfigure"); endif unwind_protect hax = newplot (hax); limits = [min(x), max(x), min(y), max(y)]; num = numel (y); dn = round (num/10); hl = plot (x(1), y(1), "color", "r", "marker", "none", x(1), y(1), "color", "g", "marker", "none", x(1), y(1), "color", "b", "marker", "o"); axis (limits); # set manual limits to speed up plotting ## Initialize the timer t = p; timerid = tic (); for n = 2:(num+dn) m = n - dn; m = max ([m, 1]); k = min ([n, num]); set (hl(1), "xdata", x(1:m), "ydata", y(1:m)); set (hl(2), "xdata", x(m:k), "ydata", y(m:k)); set (hl(3), "xdata", x(k), "ydata", y(k)); pause (t - toc (timerid)); t += p; endfor unwind_protect_cleanup if (! isempty (oldfig)) set (0, "currentfigure", oldfig); endif end_unwind_protect endfunction %!demo %! clf; %! title ("comet() animation"); %! hold on; %! t = 0:.1:2*pi; %! x = cos (2*t) .* (cos (t).^2); %! y = sin (2*t) .* (sin (t).^2); %! comet (x, y, .05); %! hold off;