AFNI program: 3dFourier

3dFourier 
(c) 1999 Medical College of Wisconsin
by T. Ross and K. Heimerl
Version 0.8 last modified 8-17-99

Usage: 3dFourier [options] dataset

The paramters and options are:
	dataset		an afni compatible 3d+time dataset to be operated upon
	-prefix name	output name for new 3d+time dataset [default = fourier]
	-lowpass f 	low pass filter with a cutoff of f Hz
	-highpass f	high pass filter with a cutoff of f Hz
	-ignore n	ignore the first n images [default = 1]
	-retrend	Any mean and linear trend are removed before filtering.
			This will restore the trend after filtering.

Note that by combining the lowpass and highpass options, one can construct
bandpass and notch filters

INPUT DATASET NAMES
-------------------
This program accepts datasets that are modified on input according to the
following schemes:
  'r1+orig[3..5]'                                    {sub-brick selector}
  'r1+orig<100.200>'                                 {sub-range selector}
  'r1+orig[3..5]<100..200>'                          {both selectors}
  '3dcalc( -a r1+orig -b r2+orig -expr 0.5*(a+b) )'  {calculation}
For the gruesome details, see the output of 'afni -help'.