Mercurial > octave-antonio
view scripts/geometry/griddatan.m @ 20158:7503499a252b stable
doc: Update docstrings to have one sentence summary as first line.
Update scripts in audio, elfun, general, geometry, and image directories.
* scripts/audio/@audioplayer/__get_properties__.m,
scripts/audio/@audioplayer/audioplayer.m, scripts/audio/@audioplayer/get.m,
scripts/audio/@audioplayer/isplaying.m, scripts/audio/@audioplayer/play.m,
scripts/audio/@audioplayer/playblocking.m, scripts/audio/@audioplayer/set.m,
scripts/audio/@audioplayer/subsasgn.m, scripts/audio/@audioplayer/subsref.m,
scripts/audio/@audiorecorder/audiorecorder.m,
scripts/audio/@audiorecorder/get.m,
scripts/audio/@audiorecorder/getaudiodata.m,
scripts/audio/@audiorecorder/getplayer.m,
scripts/audio/@audiorecorder/isrecording.m,
scripts/audio/@audiorecorder/play.m, scripts/audio/@audiorecorder/record.m,
scripts/audio/@audiorecorder/recordblocking.m,
scripts/audio/@audiorecorder/set.m, scripts/audio/@audiorecorder/stop.m,
scripts/audio/@audiorecorder/subsasgn.m,
scripts/audio/@audiorecorder/subsref.m, scripts/audio/lin2mu.m,
scripts/audio/mu2lin.m, scripts/audio/record.m, scripts/audio/sound.m,
scripts/audio/soundsc.m, scripts/audio/wavread.m, scripts/audio/wavwrite.m,
scripts/elfun/cosd.m, scripts/elfun/sind.m, scripts/elfun/tand.m,
scripts/general/accumarray.m, scripts/general/accumdim.m,
scripts/general/bitcmp.m, scripts/general/bitget.m, scripts/general/bitset.m,
scripts/general/blkdiag.m, scripts/general/cart2pol.m,
scripts/general/cart2sph.m, scripts/general/cell2mat.m,
scripts/general/celldisp.m, scripts/general/chop.m,
scripts/general/circshift.m, scripts/general/common_size.m,
scripts/general/cplxpair.m, scripts/general/cumtrapz.m,
scripts/general/dblquad.m, scripts/general/deal.m, scripts/general/del2.m,
scripts/general/display.m, scripts/general/divergence.m,
scripts/general/fieldnames.m, scripts/general/flip.m,
scripts/general/flipdim.m, scripts/general/fliplr.m, scripts/general/flipud.m,
scripts/general/gradient.m, scripts/general/interp3.m,
scripts/general/interpft.m, scripts/general/interpn.m,
scripts/general/loadobj.m, scripts/general/logspace.m,
scripts/general/methods.m, scripts/general/nargchk.m,
scripts/general/narginchk.m, scripts/general/nargoutchk.m,
scripts/general/nextpow2.m, scripts/general/nthargout.m,
scripts/general/num2str.m, scripts/general/pol2cart.m,
scripts/general/polyarea.m, scripts/general/postpad.m,
scripts/general/prepad.m, scripts/general/profile.m, scripts/general/quadgk.m,
scripts/general/quadl.m, scripts/general/quadv.m, scripts/general/randi.m,
scripts/general/rat.m, scripts/general/repmat.m, scripts/general/rot90.m,
scripts/general/rotdim.m, scripts/general/saveobj.m, scripts/general/shift.m,
scripts/general/shiftdim.m, scripts/general/sortrows.m,
scripts/general/sph2cart.m, scripts/general/structfun.m,
scripts/general/subsindex.m, scripts/general/trapz.m,
scripts/general/triplequad.m, scripts/geometry/delaunayn.m,
scripts/geometry/dsearch.m, scripts/geometry/dsearchn.m,
scripts/geometry/griddata.m, scripts/geometry/griddata3.m,
scripts/geometry/griddatan.m, scripts/geometry/inpolygon.m,
scripts/geometry/rectint.m, scripts/geometry/tsearchn.m,
scripts/geometry/voronoi.m, scripts/geometry/voronoin.m,
scripts/help/__unimplemented__.m, scripts/help/doc.m,
scripts/help/doc_cache_create.m, scripts/help/get_first_help_sentence.m,
scripts/help/help.m, scripts/help/lookfor.m, scripts/help/print_usage.m,
scripts/help/type.m, scripts/help/which.m, scripts/image/autumn.m,
scripts/image/bone.m, scripts/image/brighten.m, scripts/image/cmpermute.m,
scripts/image/colorcube.m, scripts/image/contrast.m, scripts/image/cool.m,
scripts/image/copper.m, scripts/image/cubehelix.m, scripts/image/flag.m,
scripts/image/gmap40.m, scripts/image/gray.m, scripts/image/gray2ind.m,
scripts/image/hot.m, scripts/image/hsv.m, scripts/image/image.m,
scripts/image/imagesc.m, scripts/image/imfinfo.m, scripts/image/imformats.m,
scripts/image/imread.m, scripts/image/imshow.m, scripts/image/imwrite.m,
scripts/image/iscolormap.m, scripts/image/jet.m, scripts/image/lines.m,
scripts/image/ntsc2rgb.m, scripts/image/ocean.m, scripts/image/pink.m,
scripts/image/prism.m, scripts/image/rainbow.m, scripts/image/rgb2ntsc.m,
scripts/image/spinmap.m, scripts/image/spring.m, scripts/image/summer.m,
scripts/image/white.m, scripts/image/winter.m:
Update docstrings to have one sentence summary as first line.
Re-structure to have line lengths <= 80 chars.
author | Rik <rik@octave.org> |
---|---|
date | Sun, 03 May 2015 09:36:20 -0700 |
parents | 9fc020886ae9 |
children |
line wrap: on
line source
## Copyright (C) 2007-2015 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/>. ## -*- texinfo -*- ## @deftypefn {Function File} {@var{yi} =} griddatan (@var{x}, @var{y}, @var{xi}) ## @deftypefnx {Function File} {@var{yi} =} griddatan (@var{x}, @var{y}, @var{xi}, @var{method}) ## @deftypefnx {Function File} {@var{yi} =} griddatan (@var{x}, @var{y}, @var{xi}, @var{method}, @var{options}) ## ## Generate a regular mesh from irregular data using interpolation. ## ## The function is defined by @code{@var{y} = f (@var{x})}. ## The interpolation points are all @var{xi}. ## ## The interpolation method can be @qcode{"nearest"} or @qcode{"linear"}. ## If method is omitted it defaults to @qcode{"linear"}. ## ## The optional argument @var{options} is passed directly to Qhull when ## computing the Delaunay triangulation used for interpolation. See ## @code{delaunayn} for information on the defaults and how to pass different ## values. ## @seealso{griddata, griddata3, delaunayn} ## @end deftypefn ## Author: David Bateman <dbateman@free.fr> function yi = griddatan (x, y, xi, method = "linear", varargin) if (nargin < 3) print_usage (); endif if (ischar (method)) method = tolower (method); endif [m, n] = size (x); [mi, ni] = size (xi); if (n != ni || rows (y) != m || columns (y) != 1) error ("griddatan: dimensional mismatch"); endif ## triangulate data tri = delaunayn (x, varargin{:}); yi = NaN (mi, 1); if (strcmp (method, "nearest")) ## search index of nearest point idx = dsearchn (x, tri, xi); valid = ! isnan (idx); yi(valid) = y(idx(valid)); elseif (strcmp (method, "linear")) ## search for every point the enclosing triangle [tri_list, bary_list] = tsearchn (x, tri, xi); ## only keep the points within triangles. valid = ! isnan (tri_list); tri_list = tri_list(! isnan (tri_list)); bary_list = bary_list(! isnan (tri_list), :); nr_t = rows (tri_list); ## assign x,y for each point of simplex xt = reshape (x(tri(tri_list,:),:), [nr_t, n+1, n]); yt = y(tri(tri_list,:)); ## Use barycentric coordinate of point to calculate yi yi(valid) = sum (y(tri(tri_list,:)) .* bary_list, 2); else error ("griddatan: unknown interpolation METHOD"); endif endfunction %!testif HAVE_QHULL %! [xx,yy] = meshgrid (linspace (-1,1,32)); %! xi = [xx(:), yy(:)]; %! x = 2*rand (100,2) - 1; %! x = [x;1,1;1,-1;-1,-1;-1,1]; %! y = sin (2 * sum (x.^2,2)); %! zz = griddatan (x,y,xi,"linear"); %! zz2 = griddata (x(:,1),x(:,2),y,xi(:,1),xi(:,2),"linear"); %! assert (zz, zz2, 1e-10); %!testif HAVE_QHULL %! [xx,yy] = meshgrid (linspace (-1,1,32)); %! xi = [xx(:), yy(:)]; %! x = 2*rand (100,2) - 1; %! x = [x;1,1;1,-1;-1,-1;-1,1]; %! y = sin (2*sum (x.^2,2)); %! zz = griddatan (x,y,xi,"nearest"); %! zz2 = griddata (x(:,1),x(:,2),y,xi(:,1),xi(:,2),"nearest"); %! assert (zz, zz2, 1e-10);