You didn’t post your code so I can’t determine the reason it’s not working. I believe the problem is probably the way you defined your time vector. It has to be increasing in order to provide the type of plot I believe you want, so I used cumsum to create a workable time vector, ‘TS’ here.
This may do what you want (completely guessing though):
T = [3 10 2 11 5 8 2 16];
TS = cumsum(T);
S = [1 0 1 0 1 0 1 0];
figure(1)
stairs(TS, S)
axis([xlim 0 1.1])
