[R] Taking code from packages

[Jeff Gentry]

On Fri, 13 Jan 2006, Ales Ziberna wrote:
> I am currently in the process of creating (my first) package, which (when
> ready) I intend to publish to CRAN. In the process of creating this package
> I have taken some code form existing packages. I have actually copied parts
> of functions in to new functions. This code is usually something very basic
> such as Rand index. What is the proper procedure for this?

Why not simply specify that their package is a dependency and use their
code directly?