[R] problems with rexp ?

[Göran Broström]

On Fri, 3 May 2002, Juan Ramon Gonzalez wrote:

> Does anyone know if R have any problems with the exponential random number
> generation (function rexp)?
> 
> I comment it because I executed
> 
> data<-sort(rexp(100))
> plot(data,dexp(data)/(1-pexp(data)),type="l")
> 
> and the graphic isn't constant.

Try

> data<-sort(rexp(100))
> plot(data,dexp(data)/(1-pexp(data)),type="l", ylim = c(0, 2))

and you may guess what's going on. (Has nothing to do with random 
number generation!)

Göran

> (Note: exponential distribution have a constant hazard failure rate).
> 
> Thank you,
> 
> Juan
> 
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-- 
 Göran Broström                      tel: +46 90 786 5223
 professor                           fax: +46 90 786 6614
 Department of Statistics            http://www.stat.umu.se/egna/gb/
 Umeå University
 SE-90187 Umeå, Sweden             e-mail: gb at stat.umu.se

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