Mercurial > hg > octave-lyh
annotate scripts/plot/meshgrid.m @ 12482:3244c6e0af4a
polynomial/polyval.m: Compute offset/normalization only when needed.
| author | Ben Abbott <bpabbott@mac.com> |
|---|---|
| date | Sat, 26 Feb 2011 16:21:02 -0500 |
| parents | fd0a3ac60b0e |
| children | a156263b5509 |
| rev | line source |
|---|---|
| 11523 | 1 ## Copyright (C) 1996-2011 John W. Eaton |
| 2313 | 2 ## |
| 3 ## This file is part of Octave. | |
| 4 ## | |
| 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 | |
| 7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
| 8 ## your option) any later version. | |
| 2313 | 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. | |
| 14 ## | |
| 15 ## You should have received a copy of the GNU General Public License | |
| 7016 | 16 ## along with Octave; see the file COPYING. If not, see |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 1713 | 18 |
| 3407 | 19 ## -*- texinfo -*- |
|
10793
be55736a0783
Grammarcheck the documentation from m-files.
Rik <octave@nomad.inbox5.com>
parents:
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diff
changeset
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20 ## @deftypefn {Function File} {[@var{xx}, @var{yy}, @var{zz}] =} meshgrid (@var{x}, @var{y}, @var{z}) |
| 5378 | 21 ## @deftypefnx {Function File} {[@var{xx}, @var{yy}] =} meshgrid (@var{x}, @var{y}) |
| 3439 | 22 ## @deftypefnx {Function File} {[@var{xx}, @var{yy}] =} meshgrid (@var{x}) |
| 5717 | 23 ## Given vectors of @var{x} and @var{y} and @var{z} coordinates, and |
|
9209
923c7cb7f13f
Simplify TeXinfo files by eliminating redundant @iftex followed by @tex construction.
Rik <rdrider0-list@yahoo.com>
parents:
7017
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changeset
|
24 ## returning 3 arguments, return three-dimensional arrays corresponding |
| 5717 | 25 ## to the @var{x}, @var{y}, and @var{z} coordinates of a mesh. When |
| 26 ## returning only 2 arguments, return matrices corresponding to the | |
| 27 ## @var{x} and @var{y} coordinates of a mesh. The rows of @var{xx} are | |
| 28 ## copies of @var{x}, and the columns of @var{yy} are copies of @var{y}. | |
| 29 ## If @var{y} is omitted, then it is assumed to be the same as @var{x}, | |
| 30 ## and @var{z} is assumed the same as @var{y}. | |
| 5642 | 31 ## @seealso{mesh, contour} |
| 3407 | 32 ## @end deftypefn |
| 1713 | 33 |
| 2314 | 34 ## Author: jwe |
| 35 | |
| 5378 | 36 function [xx, yy, zz] = meshgrid (x, y, z) |
| 1713 | 37 |
| 5717 | 38 if (nargin == 0 || nargin > 3) |
| 6046 | 39 print_usage (); |
| 5717 | 40 endif |
| 41 | |
| 42 if (nargin < 2) | |
| 1713 | 43 y = x; |
| 44 endif | |
| 5717 | 45 |
| 6813 | 46 ## Use repmat to ensure that the result values have the same type as |
| 47 ## the arguments. | |
| 48 | |
| 5717 | 49 if (nargout < 3) |
| 4030 | 50 if (isvector (x) && isvector (y)) |
| 6813 | 51 xx = repmat (x(:).', length (y), 1); |
| 52 yy = repmat (y(:), 1, length (x)); | |
| 1713 | 53 else |
| 54 error ("meshgrid: arguments must be vectors"); | |
| 55 endif | |
| 56 else | |
| 5717 | 57 if (nargin < 3) |
| 58 z = y; | |
| 59 endif | |
| 60 if (isvector (x) && isvector (y) && isvector (z)) | |
| 61 lenx = length (x); | |
| 62 leny = length (y); | |
| 63 lenz = length (z); | |
| 6813 | 64 xx = repmat (repmat (x(:).', leny, 1), [1, 1, lenz]); |
| 65 yy = repmat (repmat (y(:), 1, lenx), [1, 1, lenz]); | |
| 5717 | 66 zz = reshape (repmat (z(:).', lenx*leny, 1)(:), leny, lenx, lenz); |
| 67 else | |
| 6813 | 68 error ("meshgrid: arguments must be vectors"); |
| 5717 | 69 endif |
| 1713 | 70 endif |
| 71 | |
| 72 endfunction |