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comparison extra/ver20/nansum.m @ 0:6b33357c7561 octave-forge

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Initial revision
author pkienzle
date Wed, 10 Oct 2001 19:54:49 +0000
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children 999cd0f401d9
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-1:000000000000 0:6b33357c7561
1 ## Copyright (C) 2001 Paul Kienzle
2 ##
3 ## This program is free software; you can redistribute it and/or modify
4 ## it under the terms of the GNU General Public License as published by
5 ## the Free Software Foundation; either version 2 of the License, or
6 ## (at your option) any later version.
7 ##
8 ## This program is distributed in the hope that it will be useful,
9 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 ## GNU General Public License for more details.
12 ##
13 ## You should have received a copy of the GNU General Public License
14 ## along with this program; if not, write to the Free Software
15 ## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16
17 ## v = nansum (X [, dim]);
18 ## nansum is identical to the sum function except that NaN values are
19 ## treated as 0 and so ignored. If all values are NaN, the sum is
20 ## returned as 0. [Is this behaviour compatible?]
21 ##
22 ## See also: nanmin, nanmax, nanmean, nanmedian
23 function v = nansum (X, ...)
24 if nargin < 1
25 usage ("v = nansum (X [, dim])");
26 else
27 dfi = do_fortran_indexing;
28 pzoi = prefer_zero_one_indexing;
29 unwind_protect
30 do_fortran_indexing = 1;
31 prefer_zero_one_indexing = 1;
32
33 X(isnan(X)) = 0;
34 v = sum (X, all_va_args);
35 unwind_protect_cleanup
36 do_fortran_indexing = dfi;
37 prefer_zero_one_indexing = pzoi;
38 end_unwind_protect
39 endif
40 endfunction