Peak to peak time, or frequency calculation

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From: Tim (tim.vincent_at_xtra.co.nz)
Date: 10/14/04 

Date: 14 Oct 2004 07:14:06 -0700

Hi

I have imported the trace of a waveform into Excel (x=time, y=volts).
I can manually measure the time between peaks and the frequency, but I
want to know if there is a formular or equation that can do that
automatically for parts of or the whole data series.

It has a frequency range from 10 to 50 hz and I want to know the
frequency of several 60second recordings.

Any help much appreciated.

Tim

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