Is there any R package that can help me with digging out the maxima of a 1-D
trajectory ?
I have 975 1-D curves. They are only known as time series. That is a set of
points ordered with respect
to time. Some curves exhibit one only peak. Others have two peaks of different
height.
We wish to find the number of peaks and their position along the time axis.
Apparently it's a trivial problem solved looking at the zeros and the change of
sign of the 1st derivative.
In practice it is necessary to apply some criteria (which ones ?) to
discriminate between real peaks
and noise oscillations.
Presumably I ought to define the noise level with respect to peaks height in
this application ...
Maybe wavelets can help ?
Thank you in advance,
Maura
tutti i telefonini TIM!
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