Mercurial > octave-nkf
view scripts/plot/sombrero.m @ 14092:22c50cbad2ce stable
Add clf() to all plot demos.
* axis.m, compass.m, contour3.m, contourf.m, cylinder.m, ellipsoid.m,
errorbar.m, ezcontour.m, ezcontourf.m, ezmesh.m, ezmeshc.m, ezplot.m,
ezplot3.m, ezpolar.m, ezsurf.m, ezsurfc.m, feather.m, fplot.m,
loglogerr.m, pcolor.m, pie.m, pie3.m, plot3.m, plotmatrix.m,
quiver.m, quiver3.m, refreshdata.m, ribbon.m, rose.m, scatter3.m,
semilogx.m, semilogxerr.m, semilogy.m, semilogyerr.m, shading.m,
sombrero.m, stairs.m, stem.m, stem3.m, surf.m, surfc.m, surfl.m,
surfnorm.m, trimesh.m, triplot.m, trisurf.m, uimenu.m:
Add clf() to the beginning of each demo to ensure pre-existing graphics
objects don't interfere with the demo.
author | Ben Abbott <bpabbott@mac.com> |
---|---|
date | Wed, 21 Dec 2011 21:19:48 -0500 |
parents | a754c2d8a13f |
children | 72c96de7a403 |
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## Copyright (C) 1993-2011 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 ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} sombrero (@var{n}) ## Produce the familiar three-dimensional sombrero plot using @var{n} ## grid lines. If @var{n} is omitted, a value of 41 is assumed. ## ## The function plotted is ## ## @example ## z = sin (sqrt (x^2 + y^2)) / (sqrt (x^2 + y^2)) ## @end example ## @seealso{surf, meshgrid, mesh} ## @end deftypefn ## Author: jwe function [x, y, z] = sombrero (n) if (nargin == 0) n = 41; endif if (nargin < 2) if (n > 1) tx = linspace (-8, 8, n)'; ty = tx; [xx, yy] = meshgrid (tx, ty); r = sqrt (xx .^ 2 + yy .^ 2) + eps; tz = sin (r) ./ r; if (nargout == 0) surf (tx, ty, tz); box ("off"); else x = tx; y = ty; z = tz; endif else error ("sombrero: number of grid lines must be greater than 1"); endif else print_usage (); endif endfunction %!demo %! clf %! sombrero ();