[R] / Operator not meaningful for factors

[Petr PIKAL]

Hi

Yes, it is also possible. I usually use

as.numeric(as.character(some.factor.which can.be.transformed.to.numeric))

Regards
Petr

"Katya Mauff" <Katya.Mauff at uct.ac.za> napsal dne 04.05.2010 10:42:20:

> apologies-try something like this:
> > x<-rnorm(5)
> > x
> [1]  0.9128818  1.5615704 -1.2319878 -1.8689400 -1.2931785
> > x.f<-factor(x)
> > x.f
> [1] 0.912881849717846 1.56157044807315  -1.2319877852522 
-1.8689399737313 
> -1.29317849983031
> Levels: -1.8689399737313 -1.29317849983031 -1.2319877852522 
0.912881849717846 
> 1.56157044807315
> > y=as.numeric(levels(x.f))[x.f]
> > y
> [1]  0.9128818  1.5615704 -1.2319878 -1.8689400 -1.2931785
> 
> 
> 
> 
> 
> >>> Petr PIKAL <petr.pikal at precheza.cz> 2010/05/04 10:12 AM >>>
> 
> > x<-rnorm(5)
> > x
> [1] -1.1550254 -0.4578429 -0.6089007 -1.7378599  0.1297853
> > x.f<-factor(x)
> > x.f
> [1] -1.15502538070463  -0.457842907389024 -0.608900689299125 
> -1.73785992416606 
> [5] 0.129785271221269 
> 5 Levels: -1.73785992416606 -1.15502538070463 ... 0.129785271221269
> > as.numeric(x.f)
> [1] 2 4 3 1 5
> 
> 
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