MATLAB: Plot discrete time domain signals

discrete timeMATLABplot

Given n=[-1:0.01:10]. Plot the discrete time domain signal: y[n]=e^(-n)*u(n).

Below is my program but i'm not sure if it's correct since this is my fisrt time learning Matlab. Please help. Thanks!

n=-1:0.01:10;

y=exp(-n).*heaviside(n);

stem(t,y)

I recommend using following substitutions:

plot(t,y)
axis( [-1 10 0 1])

That is the definition of the heaviside function.

From the documentation:

You can use heaviside function:

 n = -5:1:20;
 x = ((4/5).^n).*heaviside(n);
 stem(n,x)

Bet be aware heaviside(0)=0.5