plotting discrete graph from 0 to 20

hey there!

Trying to plot the discrete time graph : Y[x] = 1 (if 0<=x <= 20);

how do I do that?

tries using plot and dont know how to do it

thanks

[Yuval Levy]

and its DISCRETE and so i want it to be only if x is 0,1,2,3,....,20

thanks again :)

Answer 1

[Rik]

You should be using plot with only the markers then.

plot(0:20,ones(21,1),'*')