Mercurial > octave-nkf
view scripts/plot/draw/ellipsoid.m @ 20266:83792dd9bcc1
Use in-place operators in m-files where possible.
* scripts/audio/@audioplayer/set.m, scripts/audio/@audiorecorder/set.m,
scripts/audio/mu2lin.m, scripts/elfun/cosd.m, scripts/general/del2.m,
scripts/general/profexplore.m, scripts/general/quadl.m, scripts/general/rat.m,
scripts/general/rotdim.m, scripts/help/get_first_help_sentence.m,
scripts/help/private/__strip_html_tags__.m, scripts/image/cubehelix.m,
scripts/io/textread.m, scripts/linear-algebra/duplication_matrix.m,
scripts/linear-algebra/housh.m, scripts/linear-algebra/krylov.m,
scripts/linear-algebra/logm.m, scripts/linear-algebra/normest.m,
scripts/linear-algebra/onenormest.m, scripts/optimization/fminsearch.m,
scripts/optimization/lsqnonneg.m, scripts/optimization/qp.m,
scripts/plot/appearance/annotation.m, scripts/plot/appearance/axis.m,
scripts/plot/appearance/legend.m, scripts/plot/appearance/specular.m,
scripts/plot/draw/colorbar.m, scripts/plot/draw/hist.m,
scripts/plot/draw/plotmatrix.m, scripts/plot/draw/private/__stem__.m,
scripts/plot/util/__actual_axis_position__.m,
scripts/plot/util/__gnuplot_drawnow__.m, scripts/plot/util/findobj.m,
scripts/plot/util/print.m, scripts/plot/util/private/__go_draw_axes__.m,
scripts/plot/util/private/__print_parse_opts__.m, scripts/plot/util/rotate.m,
scripts/polynomial/pchip.m, scripts/polynomial/polyaffine.m,
scripts/polynomial/polyder.m, scripts/polynomial/private/__splinefit__.m,
scripts/polynomial/residue.m, scripts/signal/arch_fit.m,
scripts/signal/arch_rnd.m, scripts/signal/bartlett.m,
scripts/signal/blackman.m, scripts/signal/freqz.m, scripts/signal/hamming.m,
scripts/signal/hanning.m, scripts/signal/spectral_adf.m,
scripts/signal/spectral_xdf.m, scripts/signal/stft.m,
scripts/sparse/bicgstab.m, scripts/sparse/cgs.m,
scripts/sparse/private/__sprand_impl__.m, scripts/sparse/qmr.m,
scripts/sparse/sprandsym.m, scripts/sparse/svds.m, scripts/specfun/legendre.m,
scripts/special-matrix/gallery.m, scripts/statistics/base/gls.m,
scripts/statistics/models/logistic_regression.m,
scripts/statistics/tests/kruskal_wallis_test.m,
scripts/statistics/tests/manova.m, scripts/statistics/tests/wilcoxon_test.m,
scripts/time/datevec.m:
Use in-place operators in m-files where possible.
author | Rik <rik@octave.org> |
---|---|
date | Tue, 26 May 2015 21:07:42 -0700 |
parents | 4e7f12a763cd |
children |
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## Copyright (C) 2007-2015 Sylvain Pelissier ## ## 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 ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} ellipsoid (@var{xc}, @var{yc}, @var{zc}, @var{xr}, @var{yr}, @var{zr}, @var{n}) ## @deftypefnx {Function File} {} ellipsoid (@dots{}, @var{n}) ## @deftypefnx {Function File} {} ellipsoid (@var{hax}, @dots{}) ## @deftypefnx {Function File} {[@var{x}, @var{y}, @var{z}] =} ellipsoid (@dots{}) ## Plot a 3-D ellipsoid. ## ## The inputs @var{xc}, @var{yc}, @var{zc} specify the center of the ellipsoid. ## The inputs @var{xr}, @var{yr}, @var{zr} specify the semi-major axis lengths. ## ## The optional input @var{n} determines the number of faces around the ## circumference of the cylinder. The default value is 20. ## ## If the first argument @var{hax} is an axes handle, then plot into this axis, ## rather than the current axes returned by @code{gca}. ## ## If outputs are requested @code{ellipsoid} returns three matrices in ## @code{meshgrid} format, such that @code{surf (@var{x}, @var{y}, @var{z})} ## generates the ellipsoid. ## @seealso{cylinder, rectangle, sphere} ## @end deftypefn ## Author: Sylvain Pelissier <sylvain.pelissier@gmail.com> function [xx, yy, zz] = ellipsoid (varargin) [hax, varargin, nargin] = __plt_get_axis_arg__ ("ellipsoid", varargin{:}); if (nargin != 6 && nargin != 7) print_usage (); endif xc = varargin{1}; yc = varargin{2}; zc = varargin{3}; xr = varargin{4}; yr = varargin{5}; zr = varargin{6}; if (nargin == 6) n = 20; else n = varargin{7}; endif theta = linspace (0, 2 * pi, n + 1); phi = linspace (-pi / 2, pi / 2, n + 1); [theta, phi] = meshgrid (theta, phi); x = xr .* cos (phi) .* cos (theta) + xc; y = yr .* cos (phi) .* sin (theta) + yc; z = zr .* sin (phi) + zc; if (nargout > 0) xx = x; yy = y; zz = z; else oldfig = []; if (! isempty (hax)) oldfig = get (0, "currentfigure"); endif unwind_protect hax = newplot (hax); surf (x, y, z); unwind_protect_cleanup if (! isempty (oldfig)) set (0, "currentfigure", oldfig); endif end_unwind_protect endif endfunction %!demo %! clf; %! ellipsoid (0, 0, 1, 2, 3, 4, 20); %! title ('ellipsoid()');