Mercurial > octave-nkf
diff scripts/strings/bin2dec.m @ 2268:ee5ec3133ed3
[project @ 1996-05-24 00:53:19 by jwe]
Initial revision
author | jwe |
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date | Fri, 24 May 1996 00:53:19 +0000 |
parents | |
children | 6dedd4e0a82f |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/scripts/strings/bin2dec.m Fri May 24 00:53:19 1996 +0000 @@ -0,0 +1,40 @@ +# Copyright (C) 1996 John W. Eaton +# +# This file is part of Octave. +# +# Octave is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the +# Free Software Foundation; either version 2, or (at your option) any +# later version. +# +# Octave is distributed in the hope that it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +# for more details. +# +# You should have received a copy of the GNU General Public License +# along with Octave; see the file COPYING. If not, write to the Free +# Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +function y = bin2dec (x) + +# usage: bin2dec (x) +# +# Returns the decimal number corresponding to the binary number in +# quotes. For example, bin2dec ("1110") returns 14. + +# Original version by Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>. + + if (nargin != 1) + usage ("bin2dec (x)"); + endif + + x = toascii (x) - toascii ("0"); + + if (all (x == 0 | x == 1)) + y = sum ((x .* (ones (rows (x), 1) * 2.^((length (x) - 1) : -1 : 0)))')'; + else + error ("bin2dec: argument must be a string of zeros and ones"); + endif + +endfunction