How to find the mean peaks in positive axis

I wish to find the mean of all peaks from the positive axis in Figure 1.

I tried

pks = findpeaks(y);

but it includes some negatif value.

How to filter out the nagative peaks and remain the positive peaks?

Answer 1

[dpb]

thresh=0;    % or whatever level you wish
pks = findpeaks(y,'MinPeakHeight',thresh);

Read the doc carefully; findpeaks has all kinds of options you'll probably find useful.

[Star Rats]

Thanks @dpb

[dpb]

NB I defined the variable threshold after first just typing in the '0' value...fixed up the Answer to reflect using the variable...dpb

Answer 2

[Sulaymon Eshkabilov]

Hi,

Here is a simple and fast answer to peak only positive peaks of your data:

Y = DATA;  % This is your data
X = findpeaks(Y);
X_pos = X(X>0);   % Selects only positive peaks

Good luck

[Star Rats]

Thanks @Sulaymon Eshkabilov