How to plot delta dirac and unit step functions

Hey all, I am having trouble trying to plot (via stem) some delta dirac and unit step functions for my Digital Signal Processing class!

The ones in particular I am trying to plot are as follows:

Thanks!

[Walter Roberson]

What function did you find to implement dirac delta?

What function did you find to implement unit step function?

[Steven Artzer]

I'm sorry, what do you mean?

[Walter Roberson]

What have you accomplished so far? What particular parts are you looking for assistance with?

[Steven Artzer]

Sorry, I just don't know the syntax to plot those functions. Trying to get plots like this

[Walter Roberson]

https://www.mathworks.com/help/matlab/ref/stem.html

[Steven Artzer]

That still doesn't help me with the syntax of the functions I posted. It's not stem I need help with, but just the delta dirac and unit step syntax

[Walter Roberson]

DIRAC = @whatever_dirac_delta_function_you_find;
UNITSTEP = @whatever_unit_step_function_you_find;
t = linspace(-50, 50, 500);
Example3 = UNITSTEP(3-T);
stem(t, Example3);

That shows you the syntax . Now you have to find or write a function that implements dirac delta, and find or write a function that implements unit step function.

[Steven Artzer]

Okay then I guess I'm mostly trying to figure out how to plot the functions listed... Like how exactly I find or write a function in Matlab for those.

[Walter Roberson]

I already showed you how to plot the functions. What I posted above was actual code.

Further example of plotting.

t = 1 : 10;
y = randi([0 1], 1, 10);
stem(t, y);

I think you should concentrate on writing functions that implement dirac delta and unit step.

Answer 1

[Kiran Felix Robert]

Hi Steven,

The Examples shown above can be used to plot the functions using stem.

Refer the documentation of Dirac-delta(Dirac)and unit-step(heaviside) they point to the MATLAB Built-in functions for the unit-step and Dirac-Delta Functions. You can use these Built-in functions to write your required expression and plot using stem.

Kiran Felix Robert