Mercurial > octave-nkf
annotate scripts/plot/sphere.m @ 10549:95c3e38098bf
Untabify .m scripts
| author | Rik <code@nomad.inbox5.com> |
|---|---|
| date | Fri, 23 Apr 2010 11:28:50 -0700 |
| parents | 16f53d29049f |
| children | be55736a0783 |
| rev | line source |
|---|---|
| 9245 | 1 ## Copyright (C) 2007, 2009 Michael Goffioul |
| 7189 | 2 ## |
| 7224 | 3 ## This file is part of Octave. |
| 7189 | 4 ## |
| 7224 | 5 ## Octave is free software; you can redistribute it and/or modify it |
| 6 ## under the terms of the GNU General Public License as published by | |
| 7 ## the Free Software Foundation; either version 3 of the License, or (at | |
| 8 ## your option) any later version. | |
| 9 ## | |
| 10 ## Octave is distributed in the hope that it will be useful, but | |
| 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 ## General Public License for more details. | |
| 7189 | 14 ## |
| 15 ## You should have received a copy of the GNU General Public License | |
| 7224 | 16 ## along with Octave; see the file COPYING. If not, see |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 7189 | 18 |
| 19 ## -*- texinfo -*- | |
| 20 ## @deftypefn {Function File} {[@var{x}, @var{y}, @var{z}] =} sphere (@var{n}) | |
| 21 ## @deftypefnx {Function File} {} sphere (@var{h}, @dots{}) | |
| 22 ## Generates three matrices in @code{meshgrid} format, such that | |
| 23 ## @code{surf (@var{x}, @var{y}, @var{z})} generates a unit sphere. | |
|
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dbd0c77e575e
Cleanup documentation file plot.texi
Rik <rdrider0-list@yahoo.com>
parents:
7224
diff
changeset
|
24 ## The matrices of @code{@var{n}+1}-by-@code{@var{n}+1}. If @var{n} is |
| 7189 | 25 ## omitted then a default value of 20 is assumed. |
| 26 ## | |
| 27 ## Called with no return arguments, @code{sphere} call directly | |
|
9040
dbd0c77e575e
Cleanup documentation file plot.texi
Rik <rdrider0-list@yahoo.com>
parents:
7224
diff
changeset
|
28 ## @code{surf (@var{x}, @var{y}, @var{z})}. If an axes handle is passed |
|
dbd0c77e575e
Cleanup documentation file plot.texi
Rik <rdrider0-list@yahoo.com>
parents:
7224
diff
changeset
|
29 ## as the first argument, the surface is plotted to this set of axes. |
| 7189 | 30 ## @seealso{peaks} |
| 31 ## @end deftypefn | |
| 32 | |
| 7215 | 33 function [xx, yy, zz] = sphere (varargin) |
| 7189 | 34 |
| 7215 | 35 [h, varargin, nargin] = __plt_get_axis_arg__ ((nargout > 0), "sphere", |
| 10549 | 36 varargin{:}); |
| 7215 | 37 if (nargin > 1) |
| 38 print_usage (); | |
| 7191 | 39 elseif (nargin == 1) |
| 7215 | 40 n = varargin{1}; |
| 7189 | 41 else |
| 7191 | 42 n = 20; |
| 7189 | 43 endif |
| 44 | |
| 45 theta = linspace (0, 2*pi, n+1); | |
| 46 phi = linspace (-pi/2, pi/2, n+1); | |
| 47 [theta,phi] = meshgrid (theta, phi); | |
| 48 | |
| 7191 | 49 x = cos (phi) .* cos (theta); |
| 50 y = cos (phi) .* sin (theta); | |
| 51 z = sin (phi); | |
| 7189 | 52 |
| 53 if (nargout > 0) | |
| 54 xx = x; | |
| 55 yy = y; | |
| 56 zz = z; | |
| 57 else | |
| 7215 | 58 surf (h, x, y, z); |
| 7189 | 59 endif |
| 60 | |
| 61 endfunction |