AFNI program: count

Usage: count [options] bot top [step]

* Produces many numbered copies of the root and/or suffix,
    counting from 'bot' to 'top' with stride 'step'.
* If 'bot' > 'top', counts backwards with stride '-step'.
* If step is of the form 'R#', then '#' random counts are produced
    in the range 'bot..top' (inclusive).
* 'bot' and 'top' must not be negative; step must be positive.

Options:
  -digits n    prints numbers with 'n' digits [default=4]
  -root rrr    prints string 'rrr' before the number [default=empty]
  -suffix sss  prints string 'sss' after the number [default=empty]
  -scale fff   multiplies each number by the factor 'fff';
                 if this option is used, -digits is ignored and
                 the floating point format '%g' is used for output.
                 ('fff' can be a floating point number.)

The main application of this program is for use in C shell programming:
  foreach fred ( `count 1 20` )
     mv wilma.${fred} barney.${fred}
  end
The backward quote operator in the foreach statement executes the
count program, captures its output, and puts it on the command line.
The loop body renames each file wilma.0001 to wilma.0020 to barney.0001
to barney.0020.  Read the man page for csh to get more information.  In
particular, the csh built-in command '@' can be useful.