[R] Running an R script without running R

[Alberto Vieira Ferreira Monteiro]

Is there any way to run an R script without running R?

As an example, suppose I have a tcl/tk interface that asks
for a number (in a GUI) and displays its factorial. Is there a
way to invoke this script without invoking R?

I'm using R 2.4.1 in GNU/Linux Fedora Core 4.

Alberto Monteiro