[R] creating random numbers

Doran, Harold HDoran at air.org
Wed Apr 25 15:44:31 CEST 2007


sample(1:2, 10, replace=TRUE) 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of raymond chiruka
> Sent: Wednesday, April 25, 2007 9:45 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] creating random numbers
> 
>      l want to create a  column of 1 and 2 randomly what 
> command should l use
>   eg
>   treatment          strata
>       
>   1                      1
>   2                      0
>   1                      1
>   2                      1
>   2                      0          
>   2                      1
>   2                      0
>   1                      0
>   these should be created randomly
>   
>   secondly if l have something like
>   for (i in 1:n ) df =c(1,rexp(1,.001),rexp(1,.002)) can l 
> add an if statement in  side the c maybe to compare the 2 
> exponential  numbers to create  another  variable
>     
>        
> ---------------------------------
> 
> 
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