How to plot this function ?

Hello all, I'm quite new to matlab , so I want to figure out how to plot that heaviside function ?

I want to get that graphic below the function.

Answer 1

[Star Strider]

Try this:

epsilon = @(t) 0.5*(t == 0) + 1*(t > 0);

t = linspace(-1, 1);

figure(1)
plot(t, epsilon(t))
axis([-1  1    -0.1  1.1])

Answer 2

[Walter Roberson]

fplot(@heaviside)