How to create an envelope in a plot from a csv. data?

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Mathias Braun
Mathias Braun 2024-1-20
评论： Mathias Braun 2024-1-20
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Hey guys,
I'm struggeling right now to create an envelope to a plot from my csv. data. Could somebody pls help me?
I've got the following code already:
fileName = 'test_amplitude_100_4.csv';
t = readtable(fileName);
times = t.Var1;
distances = t.Var2-6.894;
times = seconds(times-times(3));
figure(1)
plot(times, distances, 'b-');
grid on;
hold on;
xlabel('Zeit in s');
ylabel('Entfernung in mm');

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回答（1 个）

Sam Chak
Sam Chak 2024-1-20
Hi @Mathias Braun
MATLAB has a function called envelope() that enables users to compute the upper and lower envelopes of a signal. You can find more information about it here:
https://www.mathworks.com/help/signal/ref/envelope.html
Have you had a chance to check this out?
  1 个评论
Mathias Braun
Mathias Braun 2024-1-20
Hi @Sam Chak
Yes, I check it out but I dont get what shut be my q in the envelope? Is this the distances variable?

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