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1 ## Copyright (C) 1995, 1996, 1999, 2000, 2002, 2004, 2005, 2006, 2007 |
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2 ## Kurt Hornik |
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3 ## |
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4 ## This file is part of Octave. |
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5 ## |
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6 ## Octave is free software; you can redistribute it and/or modify it |
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7 ## under the terms of the GNU General Public License as published by |
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8 ## the Free Software Foundation; either version 3 of the License, or (at |
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9 ## your option) any later version. |
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10 ## |
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11 ## Octave is distributed in the hope that it will be useful, but |
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12 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 ## General Public License for more details. |
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15 ## |
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16 ## You should have received a copy of the GNU General Public License |
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17 ## along with Octave; see the file COPYING. If not, see |
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18 ## <http://www.gnu.org/licenses/>. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Mapping Function} {} pow2 (@var{x}) |
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22 ## @deftypefnx {Mapping Function} {} pow2 (@var{f}, @var{e}) |
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23 ## With one argument, computes |
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24 ## @iftex |
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25 ## @tex |
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26 ## $2^x$ |
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27 ## @end tex |
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28 ## @end iftex |
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29 ## @ifinfo |
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30 ## 2 .^ x |
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31 ## @end ifinfo |
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32 ## for each element of @var{x}. With two arguments, returns |
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33 ## @iftex |
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34 ## @tex |
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35 ## $f \cdot 2^e$. |
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36 ## @end tex |
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37 ## @end iftex |
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38 ## @ifinfo |
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39 ## f .* (2 .^ e). |
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40 ## @end ifinfo |
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41 ## @seealso{nextpow2} |
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42 ## @end deftypefn |
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43 |
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44 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at> |
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45 ## Created: 17 October 1994 |
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46 ## Adapted-By: jwe |
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47 |
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48 function y = pow2 (f, e) |
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49 |
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50 if (nargin == 1) |
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51 y = 2 .^ f; |
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52 elseif (nargin == 2) |
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53 y = f .* (2 .^ e); |
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54 else |
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55 print_usage (); |
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56 endif |
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57 |
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58 endfunction |
