Mercurial > octave
view scripts/miscellaneous/substruct.m @ 31248:8b75954a4670
delaunayn: adjust node ordering for positive outward normal vectors (bug #53397)
* delaunayn.m: Check sign of simplex volume, flip node order for negative
volumes to ensure positive (outward-pointing) normal vectors. Add BISTs to
check for positive volumes.
* etc/News.8.md: Append function improvement note to delaunayn change
paragraph under General Improvements.
author | Nicholas R. Jankowski <jankowski.nicholas@gmail.com> |
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date | Thu, 29 Sep 2022 23:09:05 -0400 |
parents | 5d3faba0342e |
children | 597f3ee61a48 |
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######################################################################## ## ## Copyright (C) 2006-2022 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## 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 ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{s} =} substruct (@var{type}, @var{subs}, @dots{}) ## Create a subscript structure for use with @code{subsref} or @code{subsasgn}. ## ## For example: ## ## @example ## @group ## idx = substruct ("()", @{3, ":"@}) ## @result{} idx = ## scalar structure containing the fields: ## type = () ## subs = ## @{ ## [1,1] = 3 ## [1,2] = : ## @} ## x = [1, 2, 3; ## 4, 5, 6; ## 7, 8, 9]; ## subsref (x, idx) ## @result{} 7 8 9 ## @end group ## @end example ## @seealso{subsref, subsasgn} ## @end deftypefn function s = substruct (varargin) if (nargin < 2 || mod (nargin, 2) != 0) print_usage (); endif typ = varargin(1:2:nargin); sub = varargin(2:2:nargin); braces = strcmp (typ, "()") | strcmp (typ, "{}"); dots = strcmp (typ, "."); if (all (braces | dots)) cells = cellfun ("isclass", sub, "cell"); chars = cellfun ("isclass", sub, "char"); if (any (braces & ! cells)) error ("substruct: for TYPE == () or {}, SUBS must be a cell array"); elseif (any (dots & ! chars)) error ("substruct: for TYPE == ., SUBS must be a character string"); endif else error ('substruct: TYPE must be one of "()", "{}", or ""'); endif s = struct ("type", typ, "subs", sub); endfunction %!test %! x(1,1).type = "()"; %! x(1,2).type = "{}"; %! x(1,3).type = "."; %! x(1,1).subs = {1,2,3}; %! x(1,2).subs = {":"}; %! x(1,3).subs = "foo"; %! y = substruct ("()", {1,2,3}, "{}", {":"}, ".", "foo"); %! assert (x,y); ## Test input validation %!error <Invalid call> substruct () %!error <Invalid call> substruct (1) %!error <Invalid call> substruct (1, 2, 3) %!error substruct ("x", 1) %!error substruct ("()", [1,2,3]) %!error substruct (".", {1,2,3})