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I'm given a data set of over 7500 points (generated by an ECG) and I need to find all of the relative max and mins.

Asked by Ryan Cabitac on 30 Aug 2018
Latest activity Commented on by Ryan Cabitac on 30 Aug 2018
The data points are so close together that it increases and decreases with every data point and creates thousands of negligible changes. I need to single out the big changes. I am trying to use a method that will detect if a value at 'n' is greater than the previous 50 values and next 50 values. I do not want to write it out fully. i.e
if data(n) > data(n+1) && data(n+2) && ... && data(n+50)
fprintf('true')
end
I would like to consolidate that into a more efficient line of code.

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R2017a

1 Answer

Answer by Greg
on 30 Aug 2018

Have you tried the islocalmin and islocalmax functions (introduced in R2017b)? Specifically, check out the option for 'MinSeparation' to limit how closely local extrema may be detected to each other.

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Unfortunately I have R2017a. It doesn't have that function.

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