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Added tag release-3-6-1 for changeset ba4d6343524b
author John W. Eaton <jwe@octave.org>
date Tue, 03 Apr 2012 22:37:50 -0400
parents 72c96de7a403
children 86854d032a37
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72c96de7a403 maint: update copyright notices for 2012
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1 ## Copyright (C) 1996-2012 Kurt Hornik
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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} {} cut (@var{x}, @var{breaks})
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21 ## Create categorical data from numerical or continuous data by
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22 ## cutting into intervals.
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23 ##
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24 ## If @var{breaks} is a scalar, the data is cut into that many
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25 ## equal-width intervals. If @var{breaks} is a vector of break points,
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26 ## the category has @code{length (@var{breaks}) - 1} groups.
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27 ##
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28 ## The returned value is a vector of the same size as @var{x} telling
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29 ## which group each point in @var{x} belongs to. Groups are labelled
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30 ## from 1 to the number of groups; points outside the range of
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31 ## @var{breaks} are labelled by @code{NaN}.
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32 ## @seealso{histc}
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33 ## @end deftypefn
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34
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35 ## Author: KH <Kurt.Hornik@wu-wien.ac.at>
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36 ## Description: Cut data into intervals
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37
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38 function group = cut (x, breaks)
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39
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40 persistent warned = false;
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41 if (! warned)
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42 warned = true;
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43 warning ("Octave:deprecated-function",
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44 "cut is obsolete and will be removed from a future version of Octave; please use histc instead");
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45 endif
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46
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47 if (nargin != 2)
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48 print_usage ();
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49 endif
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50
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51 if (!isvector (x))
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52 error ("cut: X must be a vector");
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53 endif
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54 if isscalar (breaks)
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55 breaks = linspace (min (x), max (x), breaks + 1);
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56 breaks(1) = breaks(1) - 1;
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57 elseif isvector (breaks)
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58 breaks = sort (breaks);
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59 else
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60 error ("cut: BREAKS must be a scalar or vector");
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61 endif
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62
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63 group = NaN (size (x));
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64 m = length (breaks);
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65 if any (k = find ((x >= min (breaks)) & (x < max (breaks))))
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66 n = length (k);
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67 group(k) = sum ((ones (m, 1) * reshape (x(k), 1, n))
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68 >= (reshape (breaks, m, 1) * ones (1, n)));
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69 endif
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70
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71 endfunction