R help - May 2004 - How to use multiple versions of a R library?

Hello everybody,

is there a possibility to install and use multiple versions of a R library 
at the same time? 
A few words regarding the background of this question:
If I change functions of an already developed package, I have to 
verify complex functions in a lot of R applications. So it would be useful
to use different versions of a function/library and switch to the newer 
function/library application by application to avoid crashes. I know that 
the library function has an argument "version", but finally I
don't know
how to install and use different versions at the same time.
Any ideas and hints are appreciated - thank you in advance!

	Kind regards,

	Lutz


	Lutz Thieme
	Product Engineering
	AMD Saxony Limited Liability Company & Co. KG
	M/S E22-PE, Wilschdorfer Landstr. 101
	D-01109 Dresden, Gemany
	phone:	+ 49-351-277 -  4269
	fax:		+ 49-351-277-9-4269

lutz.thieme at amd.com wrote:
> Hello everybody,
> 
> is there a possibility to install and use multiple versions of a R library 
> at the same time? 
> A few words regarding the background of this question:
> If I change functions of an already developed package, I have to 
> verify complex functions in a lot of R applications. So it would be useful
> to use different versions of a function/library and switch to the newer 
> function/library application by application to avoid crashes. I know that 
> the library function has an argument "version", but finally I
don't know
> how to install and use different versions at the same time.
> Any ideas and hints are appreciated - thank you in advance!

R CMD INSTALL --help
tells us to use the option
   --with-package-versions
      allow for multiple versions of the same package
when installing the packages.

Uwe Ligges





> 	Kind regards,
> 
> 	Lutz
> 
> 
> 	Lutz Thieme
> 	Product Engineering
> 	AMD Saxony Limited Liability Company & Co. KG
> 	M/S E22-PE, Wilschdorfer Landstr. 101
> 	D-01109 Dresden, Gemany
> 	phone:	+ 49-351-277 -  4269
> 	fax:		+ 49-351-277-9-4269
> 
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