How to find the mean peaks in positive axis

Question

Star Rats 2019-10-6

评论： dpb 2019-10-7

采纳的回答： dpb

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 2019-10-6

编辑：dpb 2019-10-7

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 2019-10-7

编辑：Star Rats 2019-10-7

Thanks @dpb

dpb 2019-10-7

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 2019-10-6

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 2019-10-7