signum.m

来自「详细介绍了cdma通信系统功率控制的算法」· M 代码 · 共 11 行

function y=signum(x)
%SIGNUM	finds the signum of a vector.
%	Y=SIGNUM(X)
%	X=input vector

y=x;
y(find(x>0))=ones(size(find(x>0)));
y(find(x<0))=-ones(size(find(x<0)));
y(find(x==0))=zeros(size(find(x==0)));