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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