Can I Use MinPeakProminence and MinPeakDistance at the same time?

Hello,

I will need to find each peak (dip) from a data point. However, some of the peaks are very close to each other and in that case, I need just one peak instead of all. So I used 'MinPeakDistance' so that I can maintain a gap between two peaks. At the same time, I also need to use the 'MinPeakDProminence'. Can I use both at the same time? I used both but it looks it did not help. Still I can see two dips (first dip locations) very close to each other. In the attached figure, I tried to detect dip instead of peak.

[vl, vlocs]=findpeaks(-y2,'MinPeakProminence',2,'MinPeakDistance',0.5);

[Mathieu NOE]

hello

can you share your data ?

maybe you simply need a bit of smoothing so that you get only one global dip

if that is a valid option, try with smoothdata

Answer 1

[Eric Delgado]

Yeah, sure. It's possible. Take a look at documentation of findpeaks.

• If you specify a location vector, x, then 'MinPeakWidth' must be expressed in terms of x.
• If you specify a sample rate, Fs, then 'MinPeakWidth' must be expressed in units of time.
• If you specify neither x nor Fs, then 'MinPeakWidth' must be expressed in units of samples.

% Instead of:
[vl, vlocs]=findpeaks(-y2, 'MinPeakProminence', 2, 'MinPeakDistance', 0.5);

% Do this:
[vl, vlocs]=findpeaks(-y2, x, 'MinPeakProminence', 2, 'MinPeakDistance', 0.5);