I have created a code to graph a function, but I want to repeat 10 times that signal every 3 sec in time in the graph, so it looks like a periodic signal, any ideas how?

This is the code I have so far

A = 2

t = linspace(-2, 2, 1000);

a = exp(-0.5*t)

y = A*a.*(sin(2*pi*3*t)) .* (ustep(t+1)-ustep(t-1))

plot(t, y, 'LineWidth', 2)

xlabel('t');

ylabel('y');

title('L2E1');

grid on;

Answer 1

[Star Strider]

I do not understand the units if ‘t’ so I have no idea how this corresponds to the ‘10 times every 3 sec’ requirement. I will defer to you to determine that.

This should get you started —

ustep = @(t) t>0;
A = 2;
t = linspace(-2, 2, 1000);
a = exp(-0.5*t);
y = A*a.*(sin(2*pi*3*t)) .* (ustep(t+1)-ustep(t-1));

figure
plot(t, y, 'LineWidth', 2)
xlabel('t');
ylabel('y');
title('L2E1');
grid on;

env =  envelope(y, 21, 'analytic');                 % Signal Envelope
Lv = env > min(env);                                % Extract Signal Boundaries

repeats = 10;
yv = repmat(y(Lv), 1, repeats);                     % Replicate Signal
tv = (0:numel(yv)-1) * (t(2)-t(1));                 % Create Corresponding Time Vector

figure
plot(tv, yv)
grid
xlim([min(tv)  max(tv)])
title(sprintf('Repeats = %d, Time interval: %.0f to %.1f Units', repeats, min(tv), max(tv)))

.