[R] Setting max values for rpois

[Giovanni Petris]

Bret,

the following should do:

x <- sum(pmin(rpois(recruit.f, l),3))

Giovanni

> Date: Wed, 12 May 2004 16:11:08 -0500
> From: Bret Collier <bacolli at uark.edu>
> Sender: r-help-bounces at stat.math.ethz.ch
> Precedence: list
> 
> R-users,
>          I am simulating a birth process for 4 classes of individuals with 
> l[i] being the average No. fetuses per individual.  However, I need to 
> bound the resulting values for each generated rpois to be <=3 (no 
> individual can have > 3 offspring).  I have not been able to figure out how 
> to incorporate this into the below example.  Any suggestions on integrating 
> would be appreciated.
> 
> 
> recruit.f <- c(12, 12, 25, 51)  #No. females in each age class
> l <- c(.05, 1.22, 1.6, 1.8)  #mean No. fetuses for each age class
> x <- sapply(lapply(1:4, function(i) rpois(recruit.f[i], l[i])), sum)
> 
> TIA,
> 
> Bret A. Collier
> Arkansas Cooperative Fish and Wildlife Research Unit
> University of Arkansas
> 
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-- 

 __________________________________________________
[                                                  ]
[ Giovanni Petris                 GPetris at uark.edu ]
[ Department of Mathematical Sciences              ]
[ University of Arkansas - Fayetteville, AR 72701  ]
[ Ph: (479) 575-6324, 575-8630 (fax)               ]
[ http://definetti.uark.edu/~gpetris/              ]
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