AFNI program: 3dAutoTcorrelate
Output of -help
Usage: 3dAutoTcorrelate [options] dset
Computes the correlation coefficient between each pair of
voxels in the input dataset, and stores the output into
a new anatomical bucket dataset.
Options:
-pearson = Correlation is the normal Pearson (product moment)
correlation coefficient [default].
-spearman = Correlation is the Spearman (rank) correlation
coefficient.
-quadrant = Correlation is the quadrant correlation coefficient.
-polort m = Remove polynomical trend of order 'm', for m=-1..3.
[default is m=1; removal is by least squares].
Using m=-1 means no detrending; this is only useful
for data/information that has been pre-processed.
-autoclip = Clip off low-intensity regions in the dataset,
-automask = so that the correlation is only computed between
high-intensity (presumably brain) voxels. The
intensity level is determined the same way that
3dClipLevel works.
-prefix p = Save output into dataset with prefix 'p'
[default prefix is 'ATcorr'].
-time = Save output as a 3D+time dataset instead
of a anat bucket.
Notes:
* The output dataset is anatomical bucket type of shorts.
* The output file might be gigantic and you might run out
of memory running this program. Use at your own risk!
* The program prints out an estimate of its memory usage
when it starts. It also prints out a progress 'meter'
of 1 dot per 10 output sub-bricks.
* This is a quick hack for Peter Bandettini. Now pay up.
-- RWCox - Jan 31 2002
++ Compile date = Jan 29 2009
This page auto-generated on
Fri Jan 30 20:02:19 EST 2009