[R] Factor levels.

[Christos Hatzis]

Would

levels(fff) <- c("A","S","U")

not work?  Can you send an example?

-Christos 

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Rolf Turner
> Sent: Wednesday, October 03, 2007 12:58 AM
> To: r-help list
> Subject: [R] Factor levels.
> 
> 
> I have factors with levels ``Unit", "Achieved", and 
> "Scholarship"; I wish to replace these with "U", "A", and "S".
> 
> So I do
> 
> 	fff <- factor(fff,labels=c("U","A","S"))
> 
> This works as long as all of the levels are actually present 
> in the factor.  But if ``Scholarship'' is absent (as if often 
> is) then I get an error.
> 
> I can do a workaround such as
> 
> 	fff <- factor(c("U","A","S")[fff],levels=c("U","A","S"))
> 
> but this seems kludgy to me.
> 
> Is there a sexier way?
> 
> 			cheers,
> 
> 				Rolf Turner
> 
> 
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