Usage: 3dnvals [-all] [-verbose] dataset [dataset dataset ...]
* Prints (to stdout) the number of sub-bricks in a 3D dataset.
* If -all is specified, prints out all 4 dimensions:
    Nx, Ny, Nz, Nvals
* If -verbose is used then the header name of the dataset is printed first.
* The function of this simple program is to help in scripting.

++ Compile date = Sep 17 2020 {AFNI_20.2.18:linux_ubuntu_16_64}