R: [R] Creating Binary Outcomes from a continuous variable

[Guazzetti Stefano]

consider a cutpoint of 20

x<-runif(100, min=1, max=50)
as.integer(x > 20)

Stefano

> -----Messaggio originale-----
> Da: Doran, Harold [mailto:HDoran at air.org]
> Inviato: mercoledì 7 luglio 2004 14.57
> A: r-help at stat.math.ethz.ch
> Oggetto: [R] Creating Binary Outcomes from a continuous variable
> 
> 
> Dear List:
> 
>  
> 
> I have searched the archives and my R books and cannot find a 
> method to
> transform a continuous variable into a binary variable. For example, I
> have test score data along a continuous scale. I want to create a new
> variable in my dataset that is 1=above a cutpoint (or passed the test)
> and 0=otherwise.
> 
>  
> 
> My instinct tells me that this will require a combination of the
> transform command along with a conditional selection. Any help is much
> appreciated.
> 
>  
> 
> Thanks,
> 
> Harold
> 
> 
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