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1 ## Copyright (C) 1996 Kurt Hornik |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 2, or (at your option) |
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8 ## any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} bin2dec (@var{s}) |
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22 ## Return the decimal number corresponding to the binary number |
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23 ## represented by the string @var{s}. For example, |
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24 ## |
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25 ## @example |
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26 ## bin2dec ("1110") |
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27 ## @result{} 14 |
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28 ## @end example |
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29 ## @end deftypefn |
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30 |
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31 ## Author: Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at> |
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32 ## Adapted-By: jwe |
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33 |
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34 function y = bin2dec (x) |
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35 |
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36 if (nargin != 1) |
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37 usage ("bin2dec (x)"); |
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38 endif |
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39 |
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40 x = toascii (x) - toascii ("0"); |
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41 |
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42 if (all (x == 0 | x == 1)) |
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43 y = sum ((x .* (ones (rows (x), 1) * 2.^((length (x) - 1) : -1 : 0)))')'; |
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44 else |
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45 error ("bin2dec: argument must be a string of zeros and ones"); |
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46 endif |
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47 |
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48 endfunction |
