Mercurial > octave
view scripts/general/private/__splinen__.m @ 23084:ef4d915df748
maint: Merge stable to default.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Mon, 23 Jan 2017 14:27:48 -0500 |
parents | 3a2b891d0b33 e9a0469dedd9 |
children | 092078913d54 |
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## Copyright (C) 2007-2016 David Bateman ## ## 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/>. ## Undocumented internal function. ## -*- texinfo -*- ## @deftypefn {} {@var{yi} =} __splinen__ (@var{x}, @var{y}, @var{xi}) ## Undocumented internal function. ## @end deftypefn ## FIXME: Allow arbitrary grids.. function yi = __splinen__ (x, y, xi, extrapval, f) ## ND isvector function. isvec = @(x) numel (x) == length (x); if (! iscell (x) || length (x) < ndims (y) || any (! cellfun (isvec, x)) || ! iscell (xi) || length (xi) < ndims (y) || any (! cellfun (isvec, xi))) error ("__splinen__: %s: non-gridded data or dimensions inconsistent", f); endif yi = y; for i = length (x):-1:1 yi = permute (spline (x{i}, yi, xi{i}(:)), [length(x),1:length(x)-1]); endfor [xi{:}] = ndgrid (cellfun (@(x) x(:), xi, "uniformoutput", false){:}); if (! isempty (extrapval)) idx = zeros (size (xi{1})); for i = 1 : length (x) idx |= xi{i} < min (x{i}(:)) | xi{i} > max (x{i}(:)); endfor yi(idx) = extrapval; endif endfunction