MATLAB: Find local minma / opposite of findpeaks

findpeakslocal minimaopposite

Hey, I was looking for some while for the function to get the local minima. To get the maxima there is the possibility with findpeaks but what about minima?! I hope, somebody knows if there is any. My solution would be to multiply the function by -1 and then use findpeaks, but that seems a bit stupid to me 🙂 Thanks! Leo

Best Answer

I will tell, like you, multiply by -1 then use findpeaks

Related Solutions

MATLAB: Is findpeaks same as local maxima

Let's have a look at the simple example from documentation of findpeaks:

data=[25 8 15 5 6 10 10 3 1 20 7];
findpeaks(data)

When you see the marked points on the plot, none of them are differentiable since there are more than one tangent line that can be drawn at those points. Therefore:

That the derivative must be a zero at that point? Is this also satisfied?

No, it is not, as you can see.

MATLAB: How to Find Prominence of Peaks

@Ephraim Bryski,

Yes, the prominence is the fourth (and optional) output argument of findpeaks().

[pks,locs,w,p]=findpeaks(Data);

returns the prominences in p.

[pks,locs,w,p]=findpeaks(Data,'MinPeakProminence',1000);

finds peaks with prominence >=1000 and returns the prominences in p.

Best Answer

Related Solutions

MATLAB: Is findpeaks same as local maxima

MATLAB: How to Find Prominence of Peaks

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