SHCoefficientsToGFA  [--returnparameterfile <std::string>]
                        [--processinformationaddress <std::string>] [--xml]
                        [--echo] [--debug] [--] [--version] [-h]
                        <std::string> <std::string>


   --returnparameterfile <std::string>
     Filename in which to write simple return parameters (int, float,
     int-vector, etc.) as opposed to bulk return parameters (image,
     geometry, transform, measurement, table).

   --processinformationaddress <std::string>
     Address of a structure to store process information (progress, abort,
     etc.). (default: 0)

     Produce xml description of command line arguments (default: 0)

     Echo the command line arguments (default: 0)

     debug (default: 0)

   --,  --ignore_rest
     Ignores the rest of the labeled arguments following this flag.

     Displays version information and exits.

   -h,  --help
     Displays usage information and exits.

     (required)  Input image file where each voxel contains a vector of SH

     (required)  Output image file where each voxel contains a scalar GFA.

   Description: calculate GFA from SH coefficients.


   SHCoefficientsToGFA eap_r0.015.nii.gz eap_r0.015_gfa.nii.gz

   Author(s): Jian Cheng (

   Acknowledgements: Thank you everyone.