Mercurial > hg > octave-lyh

annotate scripts/general/accumarray.m @ 13172:25467719730b stable

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
doc: Quiet Texinfo warning in accumarray.m * accumarray.m: Use @pxref for cross-reference inside parentheses
author Rik <octave@nomad.inbox5.com>
date Tue, 20 Sep 2011 12:25:02 -0700
parents 8d5f0b41e6b0
children 8aaaef4a69aa
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11523
fd0a3ac60b0e update copyright notices
John W. Eaton <jwe@octave.org>
parents: 11472
diff changeset
1 ## Copyright (C) 2007-2011 David Bateman
fd0a3ac60b0e update copyright notices
John W. Eaton <jwe@octave.org>
parents: 11472
diff changeset
2 ## Copyright (C) 2009-2010 VZLU Prague
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
3 ##
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
4 ## This file is part of Octave.
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
5 ##
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
6 ## Octave is free software; you can redistribute it and/or modify it
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
7 ## under the terms of the GNU General Public License as published by
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
8 ## the Free Software Foundation; either version 3 of the License, or (at
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
9 ## your option) any later version.
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
10 ##
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
11 ## Octave is distributed in the hope that it will be useful, but
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
12 ## WITHOUT ANY WARRANTY; without even the implied warranty of
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
14 ## General Public License for more details.
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
15 ##
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
16 ## You should have received a copy of the GNU General Public License
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
17 ## along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6770
diff changeset
18 ## <http://www.gnu.org/licenses/>.
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
19
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
20 ## -*- texinfo -*-
10793
be55736a0783 Grammarcheck the documentation from m-files.
Rik <octave@nomad.inbox5.com>
parents: 10775
diff changeset
21 ## @deftypefn {Function File} {} accumarray (@var{subs}, @var{vals}, @var{sz}, @var{func}, @var{fillval}, @var{issparse})
13152
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
22 ## @deftypefnx {Function File} {} accumarray (@var{subs}, @var{vals}, @dots{})
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
23 ##
7186
800f1fd3ffb8 [project @ 2007-11-26 19:16:07 by jwe]
jwe
parents: 7016
diff changeset
24 ## Create an array by accumulating the elements of a vector into the
9051
1bf0ce0930be Grammar check TexInfo in all .m files
Rik <rdrider0-list@yahoo.com>
parents: 8934
diff changeset
25 ## positions defined by their subscripts. The subscripts are defined by
13152
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
26 ## the rows of the matrix @var{subs} and the values by @var{vals}. Each
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
27 ## row of @var{subs} corresponds to one of the values in @var{vals}. If
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
28 ## @var{vals} is a scalar, it will be used for each of the row of
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
29 ## @var{subs}.
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
30 ##
13152
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
31 ## The size of the matrix will be determined by the subscripts
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
32 ## themselves. However, if @var{sz} is defined it determines the matrix
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
33 ## size. The length of @var{sz} must correspond to the number of columns
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
34 ## in @var{subs}.
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
35 ##
13152
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
36 ## The default action of @code{accumarray} is to sum the elements with
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
37 ## the same subscripts. This behavior can be modified by defining the
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
38 ## @var{func} function. This should be a function or function handle
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
39 ## that accepts a column vector and returns a scalar. The result of the
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
40 ## function should not depend on the order of the subscripts.
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
41 ##
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
42 ## The elements of the returned array that have no subscripts associated
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
43 ## with them are set to zero. Defining @var{fillval} to some other
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
44 ## value allows these values to be defined.
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
45 ##
13152
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
46 ## By default @code{accumarray} returns a full matrix. If
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
47 ## @var{issparse} is logically true, then a sparse matrix is returned
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
48 ## instead.
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
49 ##
13152
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
50 ## The following @code{accumarray} example constructs a frequency table
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
51 ## that in the first column counts how many occurrences each number in
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
52 ## the second column has, taken from the vector @var{x}. Note the usage
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
53 ## of @code{unique} for assigning to all repeated elements of @var{x}
13172
25467719730b doc: Quiet Texinfo warning in accumarray.m
Rik <octave@nomad.inbox5.com>
parents: 13152
diff changeset
54 ## the same index (@pxref{doc-unique}).
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
55 ##
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
56 ## @example
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
57 ## @group
13152
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
58 ## x = [91, 92, 90, 92, 90, 89, 91, 89, 90, 100, 100, 100];
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
59 ## [u, ~, j] = unique (x);
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
60 ## [accumarray(j', 1), u']
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
61 ## @result{} 2 89
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
62 ## 3 90
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
63 ## 2 91
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
64 ## 2 92
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
65 ## 3 100
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
66 ## @end group
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
67 ## @end example
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
68 ##
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
69 ## Another example, where the result is a multidimensional 3D array and
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
70 ## the default value (zero) appears in the output:
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
71 ##
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
72 ## @example
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
73 ## @group
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
74 ## accumarray ([1, 1, 1;
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
75 ## 2, 1, 2;
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
76 ## 2, 3, 2;
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
77 ## 2, 1, 2;
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
78 ## 2, 3, 2], 101:105)
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
79 ## @result{} ans(:,:,1) = [101, 0, 0; 0, 0, 0]
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
80 ## ans(:,:,2) = [0, 0, 0; 206, 0, 208]
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
81 ## @end group
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
82 ## @end example
10275
19f2107d1fdd document accumarray complexity
Jaroslav Hajek <highegg@gmail.com>
parents: 10274
diff changeset
83 ##
13152
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
84 ## The complexity in the non-sparse case is generally O(M+N), where N is
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
85 ## the number of subscripts and M is the maximum subscript (linearized
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
86 ## in multi-dimensional case). If @var{func} is one of @code{@@sum}
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
87 ## (default), @code{@@max}, @code{@@min} or @code{@@(x) @{x@}}, an
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
88 ## optimized code path is used. Note that for general reduction function
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
89 ## the interpreter overhead can play a major part and it may be more
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
90 ## efficient to do multiple accumarray calls and compute the results in
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
91 ## a vectorized manner.
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
92 ##
8d5f0b41e6b0 Improve accumarray's docstring: one more example, mention vals can be scalar
Jordi Gutiérrez Hermoso <jordigh@octave.org>
parents: 12214
diff changeset
93 ## @seealso{accumdim, unique}
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
94 ## @end deftypefn
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
95
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
96 function A = accumarray (subs, vals, sz = [], func = [], fillval = [], issparse = [])
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
97
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
98 if (nargin < 2 || nargin > 6)
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
99 print_usage ();
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
100 endif
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
101
7186
800f1fd3ffb8 [project @ 2007-11-26 19:16:07 by jwe]
jwe
parents: 7016
diff changeset
102 if (iscell (subs))
11191
01ddaedd6ad5 Reverse changeset b1f4bdc276b6. Use all lower case for "uniformoutput" option.
Rik <octave@nomad.inbox5.com>
parents: 10962
diff changeset
103 subs = cellfun (@vec, subs, "uniformoutput", false);
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
104 ndims = numel (subs);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
105 if (ndims == 1)
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
106 subs = subs{1};
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
107 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
108 else
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
109 ndims = columns (subs);
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
110 endif
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
111
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
112 if (isempty (fillval))
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
113 fillval = 0;
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
114 endif
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
115
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
116 if (isempty (issparse))
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
117 issparse = false;
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
118 endif
7186
800f1fd3ffb8 [project @ 2007-11-26 19:16:07 by jwe]
jwe
parents: 7016
diff changeset
119
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
120 if (issparse)
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
121
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
122 ## Sparse case. Avoid linearizing the subscripts, because it could overflow.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
123
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
124 if (fillval != 0)
11472
1740012184f9 Use uppercase for variable names in error() strings to match Info documentation. Only m-files done.
Rik <octave@nomad.inbox5.com>
parents: 11469
diff changeset
125 error ("accumarray: FILLVAL must be zero in the sparse case");
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
126 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
127
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
128 ## Ensure subscripts are a two-column matrix.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
129 if (iscell (subs))
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
130 subs = [subs{:}];
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
131 endif
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
132
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
133 ## Validate dimensions.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
134 if (ndims == 1)
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
135 subs(:,2) = 1;
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
136 elseif (ndims != 2)
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
137 error ("accumarray: in the sparse case, needs 1 or 2 subscripts");
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
138 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
139
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
140 if (isnumeric (vals) || islogical (vals))
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
141 vals = double (vals);
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
142 else
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
143 error ("accumarray: in the sparse case, values must be numeric or logical");
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
144 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
145
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
146 if (! (isempty (func) || func == @sum))
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
147
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
148 ## Reduce values. This is not needed if we're about to sum them, because
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
149 ## "sparse" can do that.
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
150
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
151 ## Sort indices.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
152 [subs, idx] = sortrows (subs);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
153 n = rows (subs);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
154 ## Identify runs.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
155 jdx = find (any (diff (subs, 1, 1), 2));
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
156 jdx = [jdx; n];
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
157
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
158 vals = cellfun (func, mat2cell (vals(:)(idx), diff ([0; jdx])));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
159 subs = subs(jdx, :);
10283
b178769f31ca more small improvements in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10277
diff changeset
160 mode = "unique";
b178769f31ca more small improvements in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10277
diff changeset
161 else
b178769f31ca more small improvements in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10277
diff changeset
162 mode = "sum";
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
163 endif
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
164
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
165 ## Form the sparse matrix.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
166 if (isempty (sz))
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
167 A = sparse (subs(:,1), subs(:,2), vals, mode);
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
168 elseif (length (sz) == 2)
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
169 A = sparse (subs(:,1), subs(:,2), vals, sz(1), sz(2), mode);
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
170 else
11589
b0084095098e missing semicolons in script files
John W. Eaton <jwe@octave.org>
parents: 11587
diff changeset
171 error ("accumarray: dimensions mismatch");
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
172 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
173
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
174 else
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
175
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
176 ## Linearize subscripts.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
177 if (ndims > 1)
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
178 if (isempty (sz))
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
179 if (iscell (subs))
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
180 sz = cellfun (@max, subs);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
181 else
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
182 sz = max (subs, [], 1);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
183 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
184 elseif (ndims != length (sz))
11589
b0084095098e missing semicolons in script files
John W. Eaton <jwe@octave.org>
parents: 11587
diff changeset
185 error ("accumarray: dimensions mismatch");
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
186 endif
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
187
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
188 ## Convert multidimensional subscripts.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
189 if (ismatrix (subs))
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
190 subs = num2cell (subs, 1);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
191 endif
10274
db613bccd992 take advantage of new sort optimization in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10271
diff changeset
192 subs = sub2ind (sz, subs{:}); # creates index cache
10271
297996005012 1 more small fix in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10269
diff changeset
193 elseif (! isempty (sz) && length (sz) < 2)
10269
217d36560dfa small fixes to accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10268
diff changeset
194 error ("accumarray: needs at least 2 dimensions");
10274
db613bccd992 take advantage of new sort optimization in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10271
diff changeset
195 elseif (! isindex (subs)) # creates index cache
db613bccd992 take advantage of new sort optimization in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10271
diff changeset
196 error ("accumarray: indices must be positive integers");
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
197 endif
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
198
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
199
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
200 ## Some built-in reductions handled efficiently.
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
201
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
202 if (isempty (func) || func == @sum)
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
203 ## Fast summation.
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
204 if (isempty (sz))
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
205 A = __accumarray_sum__ (subs, vals);
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
206 else
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
207 A = __accumarray_sum__ (subs, vals, prod (sz));
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
208 ## set proper shape.
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
209 A = reshape (A, sz);
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
210 endif
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
211
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
212 ## we fill in nonzero fill value.
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
213 if (fillval != 0)
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
214 mask = true (size (A));
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
215 mask(subs) = false;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
216 A(mask) = fillval;
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
217 endif
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
218 elseif (func == @max)
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
219 ## Fast maximization.
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
220
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
221 if (isinteger (vals))
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
222 zero = intmin (class (vals));
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
223 elseif (islogical (vals))
10269
217d36560dfa small fixes to accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10268
diff changeset
224 zero = false;
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
225 elseif (fillval == 0 && all (vals(:) >= 0))
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
226 ## This is a common case - fillval is zero, all numbers nonegative.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
227 zero = 0;
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
228 else
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
229 zero = NaN; # Neutral value.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
230 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
231
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
232 if (isempty (sz))
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
233 A = __accumarray_max__ (subs, vals, zero);
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
234 else
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
235 A = __accumarray_max__ (subs, vals, zero, prod (sz));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
236 A = reshape (A, sz);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
237 endif
8934
c2099a4d12ea partially optimize accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 8920
diff changeset
238
10775
6892c5562950 fix bug in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10283
diff changeset
239 if (fillval != zero && ! (isnan (fillval) || isnan (zero)))
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
240 mask = true (size (A));
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
241 mask(subs) = false;
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
242 A(mask) = fillval;
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
243 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
244 elseif (func == @min)
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
245 ## Fast minimization.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
246
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
247 if (isinteger (vals))
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
248 zero = intmax (class (vals));
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
249 elseif (islogical (vals))
10269
217d36560dfa small fixes to accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10268
diff changeset
250 zero = true;
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
251 else
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
252 zero = NaN; # Neutral value.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
253 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
254
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
255 if (isempty (sz))
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
256 A = __accumarray_min__ (subs, vals, zero);
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
257 else
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
258 A = __accumarray_min__ (subs, vals, zero, prod (sz));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
259 A = reshape (A, sz);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
260 endif
8820
89b95972e178 fix previously introduced problem in octave_sort, improve design
Jaroslav Hajek <highegg@gmail.com>
parents: 8507
diff changeset
261
10775
6892c5562950 fix bug in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10283
diff changeset
262 if (fillval != zero && ! (isnan (fillval) || isnan (zero)))
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
263 mask = true (size (A));
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
264 mask(subs) = false;
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
265 A(mask) = fillval;
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
266 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
267 else
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
268
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
269 ## The general case. Reduce values.
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
270 n = rows (subs);
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
271 if (numel (vals) == 1)
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
272 vals = vals(ones (1, n), 1);
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
273 else
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
274 vals = vals(:);
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
275 endif
11587
c792872f8942 all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents: 11523
diff changeset
276
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
277 ## Sort indices.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
278 [subs, idx] = sort (subs);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
279 ## Identify runs.
10283
b178769f31ca more small improvements in accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 10277
diff changeset
280 jdx = find (subs(1:n-1) != subs(2:n));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
281 jdx = [jdx; n];
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
282 vals = mat2cell (vals(idx), diff ([0; jdx]));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
283 ## Optimize the case when function is @(x) {x}, i.e. we just want to
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
284 ## collect the values to cells.
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
285 persistent simple_cell_str = func2str (@(x) {x});
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
286 if (! strcmp (func2str (func), simple_cell_str))
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
287 vals = cellfun (func, vals);
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
288 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
289 subs = subs(jdx);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
290
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
291 ## Construct matrix of fillvals.
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
292 if (iscell (vals))
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
293 A = cell (sz);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
294 elseif (fillval == 0)
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
295 A = zeros (sz, class (vals));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
296 else
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
297 A = repmat (fillval, sz);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
298 endif
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
299
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
300 ## Set the reduced values.
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
301 A(subs) = vals;
6770
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
302 endif
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
303 endif
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
304 endfunction
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
305
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
306 %!error (accumarray (1:5))
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
307 %!error (accumarray ([1,2,3],1:2))
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
308 %!assert (accumarray ([1;2;4;2;4],101:105), [101;206;0;208])
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
309 %!assert (accumarray ([1,1,1;2,1,2;2,3,2;2,1,2;2,3,2],101:105),cat(3, [101,0,0;0,0,0],[0,0,0;206,0,208]))
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
310 %!assert (accumarray ([1,1,1;2,1,2;2,3,2;2,1,2;2,3,2],101:105,[],@(x)sin(sum(x))),sin(cat(3, [101,0,0;0,0,0],[0,0,0;206,0,208])))
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
311 %!assert (accumarray ({[1 3 3 2 3 1 2 2 3 3 1 2],[3 4 2 1 4 3 4 2 2 4 3 4],[1 1 2 2 1 1 2 1 1 1 2 2]},101:112),cat(3,[0,0,207,0;0,108,0,0;0,109,0,317],[0,0,111,0;104,0,0,219;0,103,0,0]))
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
312 %!assert (accumarray ([1,1;2,1;2,3;2,1;2,3],101:105,[2,4],@max,NaN),[101,NaN,NaN,NaN;104,NaN,105,NaN])
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
313 %!assert (accumarray ([1 1; 2 1; 2 3; 2 1; 2 3],101:105,[2 4],@prod,0,true),sparse([1,2,2],[1,1,3],[101,10608,10815],2,4))
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
314 %!assert (accumarray ([1 1; 2 1; 2 3; 2 1; 2 3],1,[2,4]), [1,0,0,0;2,0,2,0])
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
315 %!assert (accumarray ([1 1; 2 1; 2 3; 2 1; 2 3],101:105,[2,4],@(x)length(x)>1),[false,false,false,false;true,false,true,false])
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
316 %!test
babcbcc11ab6 [project @ 2007-07-06 08:44:04 by dbateman]
dbateman
parents:
diff changeset
317 %! A = accumarray ([1 1; 2 1; 2 3; 2 1; 2 3],101:105,[2,4],@(x){x});
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
318 %! assert (A{2},[102;104])
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
319 %!test
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
320 %! subs = ceil (rand (2000, 3)*10);
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
321 %! vals = rand (2000, 1);
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
322 %! assert (accumarray (subs, vals, [], @max), accumarray (subs, vals, [], @(x) max (x)));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
323 %!test
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
324 %! subs = ceil (rand (2000, 1)*100);
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
325 %! vals = rand (2000, 1);
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
326 %! assert (accumarray (subs, vals, [100, 1], @min, NaN), accumarray (subs, vals, [100, 1], @(x) min (x), NaN));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
327 %!test
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
328 %! subs = ceil (rand (2000, 2)*30);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
329 %! subsc = num2cell (subs, 1);
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
330 %! vals = rand (2000, 1);
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
331 %! assert (accumarray (subsc, vals, [], [], 0, true), accumarray (subs, vals, [], [], 0, true));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
332 %!test
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
333 %! subs = ceil (rand (2000, 3)*10);
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
334 %! subsc = num2cell (subs, 1);
11469
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
335 %! vals = rand (2000, 1);
c776f063fefe Overhaul m-script files to use common variable name between code and documentation.
Rik <octave@nomad.inbox5.com>
parents: 11191
diff changeset
336 %! assert (accumarray (subsc, vals, [], @max), accumarray (subs, vals, [], @max));
10268
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
337
9a16a61ed43d new optimizations for accumarray
Jaroslav Hajek <highegg@gmail.com>
parents: 9859
diff changeset
338