Mercurial > octave-nkf
annotate scripts/statistics/base/ranks.m @ 10549:95c3e38098bf
Untabify .m scripts
| author | Rik <code@nomad.inbox5.com> |
|---|---|
| date | Fri, 23 Apr 2010 11:28:50 -0700 |
| parents | 952d4df5b686 |
| children | f0dc41c824ce |
| rev | line source |
|---|---|
| 7017 | 1 ## Copyright (C) 1995, 1996, 1997, 1998, 2000, 2002, 2004, 2005, 2006, |
| 8920 | 2 ## 2007, 2008, 2009 Kurt Hornik |
| 3426 | 3 ## |
| 3922 | 4 ## This file is part of Octave. |
| 5 ## | |
| 6 ## Octave is free software; you can redistribute it and/or modify it | |
| 7 ## under the terms of the GNU General Public License as published by | |
| 7016 | 8 ## the Free Software Foundation; either version 3 of the License, or (at |
| 9 ## your option) any later version. | |
| 3426 | 10 ## |
| 3922 | 11 ## Octave is distributed in the hope that it will be useful, but |
| 3200 | 12 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 3426 | 14 ## General Public License for more details. |
| 15 ## | |
| 3200 | 16 ## You should have received a copy of the GNU General Public License |
| 7016 | 17 ## along with Octave; see the file COPYING. If not, see |
| 18 ## <http://www.gnu.org/licenses/>. | |
| 3200 | 19 |
| 3453 | 20 ## -*- texinfo -*- |
| 4885 | 21 ## @deftypefn {Function File} {} ranks (@var{x}, @var{dim}) |
| 8035 | 22 ## Return the ranks of @var{x} along the first non-singleton dimension |
|
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Grammar check TexInfo in all .m files
Rik <rdrider0-list@yahoo.com>
parents:
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23 ## adjust for ties. If the optional argument @var{dim} is |
| 4885 | 24 ## given, operate along this dimension. |
| 3453 | 25 ## @end deftypefn |
| 3426 | 26 |
| 5428 | 27 ## Author: KH <Kurt.Hornik@wu-wien.ac.at> |
| 3456 | 28 ## Description: Compute ranks |
| 3200 | 29 |
| 4885 | 30 ## This code was rather ugly, since it didn't use sort due to the |
| 31 ## fact of how to deal with ties. Now it does use sort and its | |
| 32 ## even uglier!!! At least it handles NDArrays.. | |
| 33 | |
| 34 function y = ranks (x, dim) | |
| 35 | |
| 36 if (nargin != 1 && nargin != 2) | |
| 6046 | 37 print_usage (); |
| 4885 | 38 endif |
| 3426 | 39 |
| 4885 | 40 nd = ndims (x); |
| 41 sz = size (x); | |
| 42 if (nargin != 2) | |
| 4886 | 43 ## Find the first non-singleton dimension. |
| 4885 | 44 dim = 1; |
| 4886 | 45 while (dim < nd + 1 && sz(dim) == 1) |
| 4885 | 46 dim = dim + 1; |
| 47 endwhile | |
| 48 if (dim > nd) | |
| 49 dim = 1; | |
| 50 endif | |
| 51 else | |
| 4886 | 52 if (! (isscalar (dim) && dim == round (dim)) |
| 10549 | 53 && dim > 0 |
| 54 && dim < (nd + 1)) | |
| 4885 | 55 error ("ranks: dim must be an integer and valid dimension"); |
| 56 endif | |
| 3200 | 57 endif |
| 3426 | 58 |
| 4886 | 59 if (sz(dim) == 1) |
| 4885 | 60 y = ones(sz); |
| 61 else | |
| 8507 | 62 ## The algorithm works only on dim = 1, so permute if necesary. |
| 4885 | 63 if (dim != 1) |
| 64 perm = [1 : nd]; | |
| 4886 | 65 perm(1) = dim; |
| 66 perm(dim) = 1; | |
| 4885 | 67 x = permute (x, perm); |
| 68 endif | |
| 4886 | 69 sz = size (x); |
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Eliminate NaN*ones and Inf*ones constructs and just use Nan() and Inf()
Rik <code@nomad.inbox5.com>
parents:
9051
diff
changeset
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70 infvec = -Inf ([1, sz(2 : end)]); |
| 4942 | 71 [xs, xi] = sort (x); |
| 4885 | 72 eq_el = find (diff ([xs; infvec]) == 0); |
| 73 if (isempty (eq_el)) | |
| 4942 | 74 [eq_el, y] = sort (xi); |
| 4885 | 75 else |
| 76 runs = complement (eq_el+1, eq_el); | |
| 77 len = diff (find (diff ([Inf; eq_el; -Inf]) != 1)) + 1; | |
| 4942 | 78 [eq_el, y] = sort (xi); |
| 4885 | 79 for i = 1 : length(runs) |
| 10549 | 80 y (xi (runs (i) + [0:(len(i)-1)]) + floor (runs (i) ./ sz(1)) |
| 81 * sz(1)) = eq_el(runs(i)) + (len(i) - 1) / 2; | |
| 4885 | 82 endfor |
| 83 endif | |
| 84 if (dim != 1) | |
| 85 y = permute (y, perm); | |
| 86 endif | |
| 3200 | 87 endif |
| 3426 | 88 |
| 3200 | 89 endfunction |