problems with rexp ?

Have you looked at the range of the numbers?  I got

range(dexp(data)/(1-pexp(data)))

[1] 1 1

and 

range(dexp(data)/(1-pexp(data)))-1.0
[1] -1.665335e-15  1.110223e-15

Andy

-----Original Message-----
From: Juan Ramon Gonzalez [mailto:jrgonzalez at ico.scs.es]
Sent: Friday, May 03, 2002 9:34 AM
To: r-help at stat.math.ethz.ch
Subject: [R] problems with rexp ?


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.

(Note: exponential distribution have a constant hazard failure rate).

Thank you,

Juan

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