[R] Package design, placement of legacy functions

[William Asquith]

I have a function XOLD() from a nearly verbatim port of legacy  
FORTRAN in a package. I have remplemented this function as XNEW()  
using much cleaner native R and built-in functions of R. I have  
switched the package to the XNEW(), but for historical reasons would  
like to retain the XOLD() somewhere in the package directory  
structure. An assertion through a README or other will point to this  
historical function and the output from the two should be numerically  
equal.

Placement in package/R is not an option as XOLD() no longer  
constitutes a true user level function, would package/inst/legacyR or  
something like that be suitable to the R community?

Thanks for the guidance. . .

William