octave-nkf: scripts/geometry/griddatan.m annotate

annotate scripts/geometry/griddatan.m @ 19898:4197fc428c7d

maint: Update copyright notices for 2015.

author	John W. Eaton <jwe@octave.org>
date	Wed, 11 Feb 2015 14:19:08 -0500
parents	446c46af4b42
children	9fc020886ae9

rev	line source
19898 4197fc428c7d maint: Update copyright notices for 2015. John W. Eaton <jwe@octave.org> parents: 19790 diff changeset	1 ## Copyright (C) 2007-2015 David Bateman
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	2 ##
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	3 ## This file is part of Octave.
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	4 ##
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	5 ## Octave is free software; you can redistribute it and/or modify it
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	6 ## under the terms of the GNU General Public License as published by
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6826 diff changeset	7 ## the Free Software Foundation; either version 3 of the License, or (at
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6826 diff changeset	8 ## your option) any later version.
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	9 ##
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	10 ## Octave is distributed in the hope that it will be useful, but
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	13 ## General Public License for more details.
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	14 ##
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	15 ## You should have received a copy of the GNU General Public License
7016 93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6826 diff changeset	16 ## along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe] jwe parents: 6826 diff changeset	17 ## <http://www.gnu.org/licenses/>.
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	18
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	19 ## -- texinfo --
14370 fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	20 ## @deftypefn {Function File} {@var{yi} =} griddatan (@var{x}, @var{y}, @var{xi})
fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	21 ## @deftypefnx {Function File} {@var{yi} =} griddatan (@var{x}, @var{y}, @var{xi}, @var{method})
fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	22 ## @deftypefnx {Function File} {@var{yi} =} griddatan (@var{x}, @var{y}, @var{xi}, @var{method}, @var{options})
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	23 ##
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	24 ## Generate a regular mesh from irregular data using interpolation.
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	25 ## The function is defined by @code{@var{y} = f (@var{x})}.
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	26 ## The interpolation points are all @var{xi}.
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	27 ##
17281 bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted. Rik <rik@octave.org> parents: 14370 diff changeset	28 ## The interpolation method can be @qcode{"nearest"} or @qcode{"linear"}.
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted. Rik <rik@octave.org> parents: 14370 diff changeset	29 ## If method is omitted it defaults to @qcode{"linear"}.
19790 446c46af4b42 strip trailing whitespace from most source files John W. Eaton <jwe@octave.org> parents: 17744 diff changeset	30 ##
14370 fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	31 ## The optional argument @var{options} is passed directly to Qhull when
fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	32 ## computing the Delaunay triangulation used for interpolation. See
fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	33 ## @code{delaunayn} for information on the defaults and how to pass different
fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	34 ## values.
fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	35 ## @seealso{griddata, griddata3, delaunayn}
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	36 ## @end deftypefn
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	37
7017 a1dbe9d80eee [project @ 2007-10-12 21:27:11 by jwe] jwe parents: 7016 diff changeset	38 ## Author: David Bateman <dbateman@free.fr>
a1dbe9d80eee [project @ 2007-10-12 21:27:11 by jwe] jwe parents: 7016 diff changeset	39
14370 fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	40 function yi = griddatan (x, y, xi, method = "linear", varargin)
6826 8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	41
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	42 if (nargin < 3)
6826 8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	43 print_usage ();
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	44 endif
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	45
6826 8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	46 if (ischar (method))
8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	47 method = tolower (method);
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	48 endif
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	49
6826 8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	50 [m, n] = size (x);
8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	51 [mi, ni] = size (xi);
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	52
14370 fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	53 if (n != ni \|\| rows (y) != m \|\| columns (y) != 1)
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	54 error ("griddatan: dimensional mismatch");
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	55 endif
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	56
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	57 ## triangulate data
14370 fbdee844550c griddatan.m: Restore ability to pass options to underlying Qhull Rik <octave@nomad.inbox5.com> parents: 14363 diff changeset	58 tri = delaunayn (x, varargin{:});
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	59
10548 479536c5bb10 Replace lowercase nan with NaN for visual cue in scripts Rik <code@nomad.inbox5.com> parents: 8920 diff changeset	60 yi = NaN (mi, 1);
11587 c792872f8942 all script files: untabify and strip trailing whitespace John W. Eaton <jwe@octave.org> parents: 11523 diff changeset	61
6826 8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	62 if (strcmp (method, "nearest"))
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	63 ## search index of nearest point
6826 8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	64 idx = dsearchn (x, tri, xi);
8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	65 valid = !isnan (idx);
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	66 yi(valid) = y(idx(valid));
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	67
6826 8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	68 elseif (strcmp (method, "linear"))
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	69 ## search for every point the enclosing triangle
6826 8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	70 [tri_list, bary_list] = tsearchn (x, tri, xi);
6823 9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	71
9fddcc586065 [project @ 2007-08-24 08:27:27 by dbateman] dbateman parents: diff changeset	72 ## only keep the points within triangles.
6826 8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	73 valid = !isnan (tri_list);
8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	74 tri_list = tri_list(!isnan (tri_list));
8618f29520c6 [project @ 2007-08-24 16:02:07 by jwe] jwe parents: 6823 diff changeset	75 bary_list = bary_list(!isnan (tri_list), :);

Mercurial > hg > octave-nkf

annotate scripts/geometry/griddatan.m @ 19898:4197fc428c7d