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1 ## Copyright (C) 1995, 1996 Kurt Hornik |
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2 ## |
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3 ## This program is free software; you can redistribute it and/or modify |
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4 ## it under the terms of the GNU General Public License as published by |
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5 ## the Free Software Foundation; either version 2, or (at your option) |
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6 ## any later version. |
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7 ## |
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8 ## This program is distributed in the hope that it will be useful, but |
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9 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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11 ## General Public License for more details. |
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12 ## |
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13 ## You should have received a copy of the GNU General Public License |
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14 ## along with this file. If not, write to the Free Software Foundation, |
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15 ## 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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16 |
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17 ## -*- texinfo -*- |
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18 ## @deftypefn {Mapping Function} {} pow2 (@var{x}) |
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19 ## @deftypefnx {Mapping Function} {} pow2 (@var{f}, @var{e}) |
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20 ## With one argument, computes |
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21 ## @iftex |
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22 ## @tex |
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23 ## $2^x$ |
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24 ## @end tex |
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25 ## @end iftex |
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26 ## @ifinfo |
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27 ## 2 .^ x |
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28 ## @end ifinfo |
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29 ## for each element of @var{x}. With two arguments, returns |
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30 ## @iftex |
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31 ## @tex |
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32 ## $f \cdot 2^e$. |
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33 ## @end tex |
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34 ## @end iftex |
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35 ## @ifinfo |
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36 ## f .* (2 .^ e). |
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37 ## @end ifinfo |
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38 ## @end deftypefn |
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39 |
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40 ## See also: nextpow2 |
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41 |
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42 ## Author: AW <Andreas.Weingessel@ci.tuwien.ac.at> |
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43 ## Created: 17 October 1994 |
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44 ## Adapted-By: jwe |
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45 |
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46 function y = pow2 (f, e) |
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47 |
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48 if (nargin == 1) |
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49 y = 2 .^ f; |
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50 elseif (nargin == 2) |
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51 y = f .* (2 .^ e); |
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52 else |
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53 usage ("y = pow2 (f [, e])"); |
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54 endif |
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55 |
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56 endfunction |
