Step Fucntion in Matlab

Question

Reindorf Addo 2019-2-16

回答： Star Strider 2019-2-16

I am new to matlab and I have to plot this step fucntion but I don't even know where to start.

x(t) = u(t + 1) − 3u(t) + 2u(t−3) with a time interval of -2: 0.1: 2. May I please get some help? The hint was to use heaviside.

Answer 1

Star Strider 2019-2-16

Since the unit step functrion is defined as being equal to 1 for

, I would use:

Ustp0 = @(t) (t >= 0);
Ustp1 = @(t) 0.5*(t  == 0) + 1*(t > 0);             % ‘Half-Maximum’ Convention

Plotting the unit step funcitons themselves:

t = -2: 0.1: 2;
figure
subplot(2,1,1)
plot(t, Ustp0(t))
ylim([-0.1  1.1])
subplot(2,1,2)
plot(t, Ustp1(t))
ylim([-0.1  1.1])

So use those to create your function, and and go from there.

I leave the rest to you.