evenodd.m

来自「很多matlab的源代码」· M 代码 · 共 15 行

function [xe,xo,m] = evenodd(x,n)
if any(imag(x)~=0)
    error('x is not a real sequence')
end
m=-fliplr(n);
m1=min([m,n]);
m2=max([m,n]);
m=m1:m2;
nm=n(1)-m(1);
n1=1:length(n);
x1=zeros(1,length(m));
x1(n1+nm)=x;
x=x1;
xe=0.5*(x+fliplr(x));
xo=0.5*(x-fliplr(x));