www.pudn.com > GNSS_SDR.zip > invert.m, change:2006-08-14,size:1424b


function result = invert(data) 
% Inverts the binary input-string so that 0 becomes 1 and 1 becomes 0. 
% 
%result = invert(data) 
 
%-------------------------------------------------------------------------- 
%                           SoftGNSS v3.0 
%  
% Written by Darius Plausinaitis, Kristin Larson and Dennis M. Akos 
%-------------------------------------------------------------------------- 
%This program 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 
%of the License, or (at your option) any later version. 
% 
%This program 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 this program; if not, write to the Free Software 
%Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
%USA. 
%-------------------------------------------------------------------------- 
 
% CVS record: 
% $Id: invert.m,v 1.1.2.4 2006/08/14 11:38:22 dpl Exp $ 
 
dataLength = length(data); 
temp(1:dataLength) = '1'; 
 
invertMask = bin2dec(char(temp)); 
 
result = dec2bin(bitxor(bin2dec(data), invertMask), dataLength);