[R] Calling C function in R

[Manoj - Hachibushu Capital]

Hi All,
	I am trying to write a c function to optimize loop processing.
Having read the R extension and trying out a few samples I was pretty
comfortable with the basics. 

	However, I am wondering if there is anyway to call tseries
functions like adf.test or po.test from within c function. Any pointers/
code sample would be greatly appreciated.

Thank you.

Manoj