1 ## Copyright (C) 1995-2012 Kurt Hornik
3 ## This file is part of Octave.
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
20 ## @deftypefn {Mapping Function} {} pow2 (@var{x})
21 ## @deftypefnx {Mapping Function} {} pow2 (@var{f}, @var{e})
22 ## With one argument, computes
29 ## for each element of @var{x}.
31 ## With two arguments, returns
38 ## @seealso{log2, nextpow2}
41 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at>
42 ## Created: 17 October 1994
45 function y = pow2 (f, e)
60 %! assert(all (abs (pow2 (x) - v) < sqrt (eps)));
63 %! x = [3, 0, -3, 4, 0, -4, 5, 0, -5];
64 %! y = [-2, -2, -2, 1, 1, 1, 3, 3, 3];
66 %! assert(all (abs (pow2 (x,y) - z) < sqrt (eps)));