evenodd.m

This is the matlab source codes. It will generate the unit step sequnce and unit impulse sequence.

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));