Actually, no regression is performed in that command because of
the -x1D_stop option. The input datasets are only used to get
the TR, number of TRs per run and number of runs. You could
replace the -input option with -nodata and -concat.
The goal of the command is to create the stimulus time series
that we were also creating via waver. The output of the 3dD
command is the x.1D X-matrix, which should have only one column.
I am just trying to replace waver with 3dDeconvolve when converting
stim_times to stim_files; waver is easier to use, but does not do
as good a job.
- rick