[Scilab-users] Peaks and positions

[Dang, Christophe]

Hello, 

> If I have a vector , por example M= rand(418,1)

Just a question of vocabulary,
are you lookng for peaks with a given width, such as
or for "one-pixel" wide peaks,
which are sometimes refered to as "spikes"?

For spikes, you can use the cade given by Samuel,
just removing the "pC".

If the peaks have a given width,
you can locate the minima of the second derivative,
best after smoothing, e.g.

http://commons.wikimedia.org/wiki/File:Desommation_trois_pics_gaussiens_21pts.svg

(source code here : http://commons.wikimedia.org/wiki/File:Detection_pic_savitzky_Golay.svg#Scilab_source )

Best regards

-- 
Christophe Dang Ngoc Chan
Mechanical calculation engineer




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