calcgs

calcgs computes the global signal of the input TES file. If the input file name is "file1.tes", then the output file name will be "file1_GS.ref." Entering "calcgs" without any command line parameters will display usage information on stderr: Here's the help text:

VoxBo calcgs (v1.8.5/Jun 14 2011)
summary:  Calc GS routine for VoxBo.
usage:
 calcgs -h -i[4D data file name] -u -v
flags:
 -h                        Print usage information. Optional.
 -i <4D data file>         Specify the input 4D data file. Required.
 -u                        Unit variance flag for GS. Optional.
 -v                        Global VoxBo version number. Optional.