Mercurial > octave
view scripts/plot/draw/ezplot.m @ 27919:1891570abac8
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2020.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 06 Jan 2020 22:29:51 -0500 |
parents | b442ec6dda5c |
children | bd51beb6205e |
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## Copyright (C) 2008-2020 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this distribution ## or <https://octave.org/COPYRIGHT.html/>. ## ## ## 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 {} {} ezplot (@var{f}) ## @deftypefnx {} {} ezplot (@var{f2v}) ## @deftypefnx {} {} ezplot (@var{fx}, @var{fy}) ## @deftypefnx {} {} ezplot (@dots{}, @var{dom}) ## @deftypefnx {} {} ezplot (@dots{}, @var{n}) ## @deftypefnx {} {} ezplot (@var{hax}, @dots{}) ## @deftypefnx {} {@var{h} =} ezplot (@dots{}) ## ## Plot the 2-D curve defined by the function @var{f}. ## ## The function @var{f} may be a string, inline function, or function handle ## and can have either one or two variables. If @var{f} has one variable, then ## the function is plotted over the domain @code{-2*pi < @var{x} < 2*pi} ## with 500 points. ## ## If @var{f2v} is a function of two variables then the implicit function ## @code{@var{f}(@var{x},@var{y}) = 0} is calculated over the meshed domain ## @code{-2*pi <= @var{x} | @var{y} <= 2*pi} with 60 points in each dimension. ## ## For example: ## ## @example ## ezplot (@@(@var{x}, @var{y}) @var{x}.^2 - @var{y}.^2 - 1) ## @end example ## ## If two functions are passed as inputs then the parametric function ## ## @example ## @group ## @var{x} = @var{fx} (@var{t}) ## @var{y} = @var{fy} (@var{t}) ## @end group ## @end example ## ## @noindent ## is plotted over the domain @code{-2*pi <= @var{t} <= 2*pi} with 500 points. ## ## If @var{dom} is a two element vector, it represents the minimum and maximum ## values of both @var{x} and @var{y}, or @var{t} for a parametric plot. If ## @var{dom} is a four element vector, then the minimum and maximum values are ## @code{[xmin xmax ymin ymax]}. ## ## @var{n} is a scalar defining the number of points to use in plotting ## the function. ## ## 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 vector of graphics handles to ## the created line objects. ## ## @seealso{plot, ezplot3, ezpolar, ezcontour, ezcontourf, ezmesh, ezmeshc, ezsurf, ezsurfc} ## @end deftypefn function h = ezplot (varargin) [htmp, needusage] = __ezplot__ ("plot", varargin{:}); if (needusage) print_usage (); endif if (nargout > 0) h = htmp; endif endfunction %!demo %! ## sinc function using function handle %! clf; %! f = @(x) sin (pi*x) ./ (pi*x); %! ezplot (f); %!demo %! ## example of a function string and explicit limits %! clf; %! ezplot ("1/x", [-2 2]); %!demo %! ## parameterized function example over -2*pi <= t <= +2*pi %! clf; %! ezplot (@cos, @sin); %!demo %! ## implicit function of 2 variables %! clf; %! ezplot (inline ("x^2 - y^2 - 1"));