[R] factor

Peter Dalgaard p.dalgaard at biostat.ku.dk
Wed Feb 4 08:12:44 CET 2009


kayj wrote:
> I am looking into change the numeric order in the level of the factor 
> 
>> x<-c("A","B","C")
>> fx<-factor(x)
>> fx
> [1] A B C
> Levels: A B C
>> factor(x)
> [1] A B C
> Levels: A B C
>> as.numeric(fx)
> [1] 1 2 3
>  
> I want to change the order of the numeric into 3 corresponds to “A” level, 2
> corresponds to “B” level and 1 corresponds to “C” level
> 
> So when I type in 
> 
> As.numeric(fx) I  would like to get 
> 
> 3 2 1 
> 
> Your help is greatly appreciated
> 

fx <- factor(x, levels=c("C","B","A"))

-- 
    O__  ---- Peter Dalgaard             Øster Farimagsgade 5, Entr.B
   c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
  (*) \(*) -- University of Copenhagen   Denmark      Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)              FAX: (+45) 35327907




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