Can fploy and ezplot a discrete time signal?

I'm trying to plot a discrete time signal : y[n] = 5𝛿(n)+3u(n-3) , for n=[-1:0.01:10] by using fplot or ezplot.

Here's what I've tried but the result seems not correct.

n = [-1:0.01:10];

y = 5*dirac(n) + 3*heaviside(n-3);

fplot(y)

grid on

xlabel('t (time)');

ylabel('[y5(t)]');

Answer 1

[Walter Roberson]

No. fplot and ezplot are for function handles or symbolic expressions or symbolic functions. They treat numbers as if they were a formula that returned that number.

Use a different plotting function such as stairs or stem