fft

Perform a fast Fourier transform on data sets.

fft <dset0> [<dset1> ...] [out <outfile>] [name <outsetname>] [dt <samp_int>]

<dset0> [<dset1 ...] Argument(s) specifying datasets to be used.
[out <outfile>] Write results to file named <outfile>.
[name <outsetname>] The resulting transform will be stored with name <outsetname>.
[dt <samp_int>] Set the sampling interval (default is 1.0).

Perform fast Fourier transform (FFT) on specified data set(s). If more than 1 data set, they must all have the same size.