binvec2quadvec.m

本程序利用改进的CHOW算法

function b=binvec2quadvec(a)
%pass a binary vector the result is a quad vector b(0,1,2,3)
%if a's length is odd, adds a zero at the first of a
%This software is protected under international copyright laws.
%Violaters will be prosecuted to the furthest extent of the law.
%Copyright 1999 - Joe Williams, Dr. Geoffrey Orsak, Southern 
%                 Methodist University. ALL RIGHTS RESERVED.
%DO NOT use code without author(s) permission

if mod(length(a),2)==0
b=zeros(1,length(a)/2);
for c=1:2:length(a)
b(c/2+.5)=2*a(c)+a(c+1);
end
else
b=zeros(1,(length(a)+1)/2);
b(1)=a(1);
for c=2:2:length(a)
b(c/2+1)=2*a(c)+a(c+1);
end
end