Recently installed FSL 5.0.9 on our linux workstation with Debian OS.
fslmerge will repeat the 1st input file N times for N files given.
Example:
>fslmerge -t out.nii.gz x.nii.gz y.nii.gz z.nii.gz
x, y and z being 3D image files
the out file contains the image x repeated three times in the 4th dimension (time)
|