Re: problems about white noise confidence intervals

Generally, if the lag-1 autocorrelation is not significant, then
test against white noise; if significant, use red noise.
  http://www.ncl.ucar.edu/Applications/spec.shtml

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Good Luck
On 12/11/12 3:27 AM, Tq wrote:
> Hi,
>
>
> After caculating the spectra of a time series,how can I decide whether I should do a test  for the peridic signals in red noise or in white noise? And how can I using NCL to calculate white noise confidence intervals?
>
>
> Thank you very much!
>
>
> Best regards,
>
>
> Nee
>
>
>
>
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