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1 ## Copyright (C) 2007 David Bateman |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 3 of the License, or (at |
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8 ## your option) any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {@var{idx} =} dsearchn (@var{x}, @var{tri}, @var{xi}) |
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21 ## @deftypefnx {Function File} {@var{idx} =} dsearchn (@var{x}, @var{tri}, @var{xi}, @var{outval}) |
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22 ## @deftypefnx {Function File} {@var{idx} =} dsearchn (@var{x}, @var{xi}) |
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23 ## @deftypefnx {Function File} {[@var{idx}, @var{d}] =} dsearchn (@dots{}) |
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24 ## Returns the index @var{idx} or the closest point in @var{x} to the elements |
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25 ## @var{xi}. If @var{outval} is supplied, then the values of @var{xi} that are |
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26 ## not contained within one of the simplicies @var{tri} are set to |
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27 ## @var{outval}. Generally, @var{tri} is returned from @code{delaunayn |
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28 ## (@var{x})}. |
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29 ## @seealso{dsearch, tsearch} |
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30 ## @end deftypefn |
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31 |
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32 function [idx, d] = dsearchn (x, t, xi, outval) |
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33 if (nargin < 2 || nargin > 4) |
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34 print_usage (); |
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35 endif |
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36 |
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37 if (nargin == 2) |
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38 [idx, d] = __dsearchn__ (x, t); |
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39 else |
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40 [idx, d] = __dsearchn__ (x, xi); |
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41 if (nargin == 4) |
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42 idx2 = isnan (tsearchn (x, t, xi)); |
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43 idx(idx2) = outval; |
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44 d(idx2) = outval; |
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45 endif |
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46 endif |
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47 endfunction |
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48 |
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49 %!shared x, tri |
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50 %! x = [-1,-1;-1,1;1,-1]; |
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51 %! tri = [1,2,3]; |
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52 %!assert (dsearchn(x,tri,[1,1/3]), 3); |
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53 %!assert (dsearchn(x,tri,[1,1/3],NaN), NaN); |
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54 %!assert (dsearchn(x,tri,[1,1/3],NA), NA); |
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55 %!assert (dsearchn(x,tri,[1/3,1]), 2); |
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56 %!assert (dsearchn(x,tri,[1/3,1],NaN), NaN); |
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57 %!assert (dsearchn(x,tri,[1/3,1],NA), NA); |
