[R] Loading same libraries (old version & newest version) in r

[Patrick Connolly]

On Mon, 12-Oct-2009 at 10:54AM +1100, Steven Kang wrote:

|> Hi all,
|> 
|> I require 2 RMySQL libraries in order to query from a database.

You mean you require 2 RMySQL packages.  We must be pedantic to answer
your question.

|> 
|> 'RMySQL_0.7-4' (newest version) results in an error when more than 1 field
|> is queried.
|> 
|> ''RMySQL_0.5-11' (old version) resolves this issue where more than 1 field
|> can be queried without any errors. However, other queries results in an
|> error messeges (but no error messeges with 'RMySQL_0.7-4' package)
|> 
|> Thus, I require two scripts each with different 'RMySQL' packages loaded to
|> query from a database.

If you put your *packages* in separate *libraries*, you can load the
one you require using the lib.loc parameter, e.g.

require(RMySQL, lib.loc = "/path/to/oldPackage") 

When you wish to use the one in /path/to/newPackage, unload the old
one and change the lib.loc value.

HTH






|> 
|> Are there any commands that will do the job (i.e. loading 2 different
|> libraries from different folder) without having to click 'Pakages' tool bar
|> in th RGui console?
|> 
|> Your help in resolving this issue would be appreciated.
|> 
|> 
|> 
|> 
|> 
|> 
|> Steven
|> 
|> 	[[alternative HTML version deleted]]
|> 
|> ______________________________________________
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|> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
|> and provide commented, minimal, self-contained, reproducible code.

-- 
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   ___    Patrick Connolly   
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