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annotate scripts/strings/bin2dec.m @ 2276:6dedd4e0a82f

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[project @ 1996-05-24 04:58:21 by jwe]
author jwe
date Fri, 24 May 1996 04:58:21 +0000
parents ee5ec3133ed3
children 5cffc4b8de57
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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 the
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7 # Free Software Foundation; either version 2, or (at your option) any
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8 # later version.
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9 #
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10 # Octave is distributed in the hope that it will be useful, but WITHOUT
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11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 # 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 02111-1307, USA.
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18
ee5ec3133ed3 [project @ 1996-05-24 00:53:19 by jwe]
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19 function y = bin2dec (x)
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20
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21 # usage: bin2dec (x)
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22 #
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23 # Returns the decimal number corresponding to the binary number in
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24 # quotes. For example, bin2dec ("1110") returns 14.
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26 # Original version by Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>.
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27
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28 if (nargin != 1)
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29 usage ("bin2dec (x)");
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30 endif
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31
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32 x = toascii (x) - toascii ("0");
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33
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34 if (all (x == 0 | x == 1))
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35 y = sum ((x .* (ones (rows (x), 1) * 2.^((length (x) - 1) : -1 : 0)))')';
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36 else
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37 error ("bin2dec: argument must be a string of zeros and ones");
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38 endif
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39
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40 endfunction