Which direction is it truncated? (only values less than a allowed or only
greater?).
One simple approach is rejection sampling, just generate from a regular poisson
distribution, then throw away any values in the truncated region. Another
approach if the legal values are those from 0 to a, so that there is a finite
number of possibilities, then you can use the sample function with replace=TRUE
and using probabilities from the poisson in the legal range.
-----Original Message-----
From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On Behalf Of cassie jones
Sent: Monday, May 16, 2011 5:28 PM
To: r-help at r-project.org
Subject: [R] simulation from truncated poisson
Dear all,
I need to simulate values from a Poisson distribution which is truncated at
certain value 'a'. Can anyone tell me if there is in-built package in R
which can simulate from a truncated Poisson? If not, what should be the
steps to write a function which would do that?
Thanks in advance.
Cassie
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