Selection Portions of a Plot

T
T
18 Oct 2012
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Suppose I have this function with multiple peaks that ranges from time = 2000 s to time = 7000 s.
Suppose there are five peaks and they are seperated evenly apart.
Suppose I want to pick the third peak.
How would I do this in MATLAB?

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Azzi Abdelmalek
Azzi Abdelmalek le 18 Oct 2012
Modifié(e) : Azzi Abdelmalek le 18 Oct 2012

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t=0:0.1:30
y=sin(t)
[peaks,idx]=findpeaks(y)
%the third peak is
peaks(3)

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T
T le 18 Oct 2012
Modifié(e) : T le 18 Oct 2012
I guess I am being misleading when I say function. I actually have a whole set of data points that contribute to these so-called peaks. So I don't think that findpeaks would apply? It's interesting to know that there is such an operator.
Furthermore, where do I find findpeaks.m? Is this supposed to be built into MATLAB?
Azzi Abdelmalek
Azzi Abdelmalek le 18 Oct 2012
can you post your data using a link
Star Strider
Star Strider le 18 Oct 2012
The findpeaks function is part of the Signal Processing Toolbox.

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