why does findpeaks detects minimas?

I got the data of an acceleration sensor and I want to detect only the local maximas, I used

 plot(data);
 findpeaks(data);

but it also detected the minimas, but why?

With

findpeaks(data,'MINPEAKHEIGHT',2);

it worked as I expected the function to work, but I can't use 2 as a static threshold for my application. Did I something wrong, that it also detects the minimas or do I have to find a way to implement an adaptive threshold?

Answer 1

[Star Strider]

It is not detecting minima, it is detecting noise peaks near the minima. The findpeaks function has a number of name-value pair arguments that can help you detect only what you want. Consider MinPeakHeight and MinPeakDistance, and others to get the result you want.