How to mark local peak values of a signal an count them? Matlab GUI

I have a signal and after several operations in matlab gui, i get this signal:

But i want to mark it's peak values like this (and also count them):

What is the code to mark and count the peak values of this kind signal? Thanks in advance!!

Answer 1

[kjetil87]

try this one?

http://www.mathworks.se/help/signal/ref/findpeaks.html

if you end up marking to many peaks, try playing around with

'MINPEAKDISTANCE' , 'THRESHOLD' and 'MINPEAKHEIGHT'