[y,range,freq,per] = fft(x)
[y,range,freq,per] = fft(x,range,...)
x
[ tseries ] - Input tseries object that will be transformed.
range
[ numeric | Inf ] - Date range.
y
[ numeric ] - Fourier transform with data organised in columns.
range
[ numeric ] - Actually used date range.
freq
[ numeric ] - Frequencies corresponding to FFT vector elements.
per
[ numeric ] - Periodicities corresponding to FFT vector elements.
'full='
[ true
| false
] - Return Fourier transform on the whole interval [0,2*pi]; if false only the interval [0,pi] is returned.}