Selection Portions of a Plot

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?

Answer 1

[Azzi Abdelmalek]

t=0:0.1:30
y=sin(t)
[peaks,idx]=findpeaks(y)

%the third peak is

peaks(3)

[T]

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]

can you post your data using a link

[Star Strider]

The findpeaks function is part of the Signal Processing Toolbox.