FOURIER The one-sided Fourier frequencies for a given length time series. F=FOURIER(N) returns the one-sided (or positive) Fourier frequencies for a time series of length N. F is a radian or angular frequency so that the Nyquist is at PI. F=FOURIER(DT,N) uses sample rate DT in calculating the frequencies, so that the Nyquist will be at PI/DT. Note that the highest resolved frequency, MAX(F), differs for even or odd N. For even N, it is the Nyquist PI/DT, but for odd N the Nyquist is not resolved and the highest resolved frequency is (N-1)/N * PI/DT. F has length FLOOR(N/2)+1, or N/2+1 for even N, and (N+1)/2 for odd N. See also CENTEREDTIMES. Usage: f=fourier(N); f=fourier(dt,N); __________________________________________________________________ This is part of JLAB --- type 'help jlab' for more information (C) 2011--2014 J.M. Lilly --- type 'help jlab_license' for details