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

**References**:**Need to calculate Nyquist frequency from data***From:*anil_rohilla@rediffmail.com (Anil Rohilla)