I've been given a signal, how can I find the peaks with the islocalmax function?

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Hannah Oduntan
Hannah Oduntan 2018-12-21
评论： Hannah Oduntan 2018-12-29
How can I find the peaks using the islocalmax function, with the attachment below as my only source of information?
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Image Analyst
Image Analyst 2018-12-22
编辑：Image Analyst 2018-12-22
For example when the help documentation gave the example:
x = 1:100;
A = (1-cos(2*pi*0.01*x)).*sin(2*pi*0.15*x);
TF = islocalmax(A);
plot(x,A,x(TF),A(TF),'r*')
Is there some reason you couldn't replace the A with your data?
See my answer below where I did that for you.

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Image Analyst
Image Analyst 2018-12-22
All you have to do is to put your signal in for the "A" in the help demo. Try this:
s = load('signals (1).mat')
signal = s.Signal;
% Find local max, following the demo in the help
x = 1 : length(signal);
TF = islocalmax(signal);
plot(x, signal, x(TF), signal(TF), 'r*')
grid on;
0000 Screenshot.png
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Image Analyst
Image Analyst 2018-12-29
OK thanks. Though it pretty much looks like my code except that you use black stars instead of red ones, plot in two lines of code instead of 1, and have different variable names. But it's substantially the same except for very minor differences. Would you mind "Accepting this answer" so others know it's solved.

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