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MathGroup Archive 2004

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Re: Need to calculate Nyquist frequency from data

  • To: mathgroup at smc.vnet.net
  • Subject: [mg51360] Re: [mg51308] Need to calculate Nyquist frequency from data
  • From: Sseziwa Mukasa <mukasa at jeol.com>
  • Date: Fri, 15 Oct 2004 02:46:11 -0400 (EDT)
  • References: <200410141035.GAA14833@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

On Oct 14, 2004, at 6:35 AM, Anil Rohilla wrote:

> How i will calculates Nyquest frequency from a time series, details of
> time series are, it having 122 data values, daily one data id there, so
> total 122 days data,how i can calculates cutt of frequencies,,,etc

The Nyquist frequency is 1/2 the reciprocal of the sample rate, so your 
data has a Nyquist frequency of 1/(2 days) or converting days to 
seconds 1/(172,800 seconds) or roughly 5.8 10^-6 Hz.

Regards,

Ssezi


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