Can you please help me ?

Hi ! I am new in matlab and i have to write a matlab code to generate the signals: y(t)=3r(t+3)-6r(t+1)+3r(t)-3u(t-3) and y(t)= 2r(t‐2) + 4u(t‐1) +2 r(t).

Can you please help me ?

[Walter Roberson]

What is r in this context?

Is u the unit step function?

[Maria Thomaidou]

u is Unique Sloping Function and r is Unique Step Function

[Walter Roberson]

r is t times u so if you implement u then you can easily implement r as well.

[Maria Thomaidou]

The problem was that it was my first matlab lesson..And i found it hard!! Thank god i finally made it thanks anyway <3

Answer 1

[Kautuk Raj]

The following code plots the functions pointed by you:

% Define the ramp function r(t)
r = @(t) t .* (t >= 0);

% Define the unit step function u(t)
u = @(t) 1 .* (t >= 0);

% Define the time range for the signals
t = -5:0.1:5;

% Define the first signal
y1 = 3*r(t+3) - 6*r(t+1) + 3*r(t) - 3*u(t-3);

% Define the second signal
y2 = 2*r(t-2) + 4*u(t-1) + 2*r(t);

% Plot the signals
subplot(2,1,1)
plot(t,y1)
xlabel('t')
ylabel('y(t)')
title('Signal y(t) = 3r(t+3) - 6r(t+1) + 3r(t) - 3u(t-3)')

subplot(2,1,2)
plot(t,y2)
xlabel('t')
ylabel('y(t)')
title('Signal y(t) = 2r(t-2) + 4u(t-1) + 2r(t)')

The resultant plots look like:

[Walter Roberson]

We do not encourage people to post complete solutions to homework problems.

The regular volunteers sometimes post code for problems that are similar to what the user is asking for, that illustrate the major steps, so that the user would need to examine the code and figure out how it works in order to answer their homework.