AFNI program: 3dTcorr1D
Output of -help
Usage: 3dTcorr1D [options] xset y1D
Computes the correlation coefficient between each voxel time series
in the input 3D+time dataset 'xset' and each column in the 1D time
series file 'y1D', and stores the output values in a new dataset.
OPTIONS:
-pearson = Correlation is the normal Pearson (product moment)
correlation coefficient [this is the default method].
-spearman = Correlation is the Spearman (rank) correlation
coefficient.
-quadrant = Correlation is the quadrant correlation coefficient.
-ktaub = Correlation is Kendall's tau_b coefficient.
++ For 'continuous' or finely-discretized data, tau_b and
rank correlation are nearly equivalent (but not equal).
-prefix p = Save output into dataset with prefix 'p'
[default prefix is 'Tcorr1D'].
-mask mmm = Only process voxels from 'xset' that are nonzero
in the 3D mask dataset 'mmm'.
++ Other voxels in the output will be set to zero.
-float = Save results in float format [the default format].
-short = Save results in scaled short format [to save disk space].
NOTES:
* The output dataset is functional bucket type, with one sub-brick
per column of the input y1D file.
* No detrending, blurring, or other pre-processing options are available;
if you want these things, see 3dDetrend or 3dBandpass or 3dcalc.
[In other words, this program presumes you know what you are doing!]
* Also see 3dTcorrelate to do voxel-by-voxel correlation of TWO
3D+time datasets' time series, with similar options.
* http://en.wikipedia.org/wiki/Correlation
* http://en.wikipedia.org/wiki/Pearson_product-moment_correlation_coefficient
* http://en.wikipedia.org/wiki/Spearman%27s_rank_correlation_coefficient
* http://en.wikipedia.org/wiki/Kendall_tau_rank_correlation_coefficient
-- RWCox - Apr 2010
- Jun 2010: Multiple y1D columns; OpenMP; -short; -mask.
=========================================================================
* This binary version of 3dTcorr1D is NOT compiled using OpenMP, a
semi-automatic parallelizer software toolkit, which splits the work
across multiple CPUs/cores on the same shared memory computer.
* However, the source code is modified for OpenMP, and can be compiled
with an OpenMP-capable compiler, such as gcc 4.2+, Intel's icc, and
Sun Studio.
* If you wish to compile this program with OpenMP, see the man page for
your C compiler, and (if needed) consult the AFNI message board, and
http://afni.nimh.nih.gov/pub/dist/doc/misc/OpenMP.html
++ Compile date = May 2 2012
This page auto-generated on
Thu May 3 04:28:33 EDT 2012