> I am confused by the function of ezfftf. The output is supposed to be
>the coefficients of the harmonics. For example, cf(0,i) and cf(1,i) are
>the coefficients of some sin and cos harmonic components. How to express
>the wave length or the frequency of that harmonics in terms of "i" and the
>interval and number of the periodic time series? Assume the time series
>data has interval of T, and the total number is n.
Based upon an off-line email between Jianjun and I
it was determined that the NCL function "fourier_info"
was appropriate for his needs.
However, to further clarify the frequencies to which
the individual real [ cf(0,:) ] and imaginary [ cf(1,:) ]
coefficients refer, we will add the following to the
The frequency spacing is 1./N. The frequencies that
the 'cf' correspond to are:
cf(0,0) and cf(1,0) corresponds is 1./N
cf(0,1) and cf(1,1) 2./N
cf(0,2) and cf(1,2) 3./N
---- Regards Dennis Shea
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