%
% Example 2.12
%
% continuous-time step function
t=-3:0.01:5;
t0=1;
u=stepfun(t,t0);
figure (1)
plot(t,u)
xlabel('time t')
ylabel('u(t-1)')
title('continuous-time shifted step function')
% discrete-time step function
k=-3:1:5;
k0=2
du=stepfun(k,k0)
figure (2)
plot(k,du,'*')
title ('discrete-time step function')
xlabel('time k')
ylabel('u[k-2]')