udpois | R Documentation |
Create UNU.RAN object for a Poisson distribution
with parameter lambda
.
[Distribution] – Poisson.
udpois(lambda, lb = 0, ub = Inf)
lambda |
(non-negative) mean. |
lb |
lower bound of (truncated) distribution. |
ub |
upper bound of (truncated) distribution. |
The Poisson distribution has density
p(x) = lambda^x exp(-lambda)/x!
for x = 0, 1, 2, ….
The domain of the distribution can be truncated to the
interval (lb
,ub
).
An object of class "unuran.discr"
.
Josef Leydold and Wolfgang H\"ormann unuran@statmath.wu.ac.at.
N.L. Johnson, S. Kotz, and A.W. Kemp (1992): Univariate Discrete Distributions. 2nd edition, John Wiley & Sons, Inc., New York. Chap. 4, p. 151.
unuran.discr
.
## Create distribution object for Poisson distribution dist <- udpois(lambda=2.3) ## Generate generator object; use method DARI gen <- darid.new(dist) ## Draw a sample of size 100 x <- ur(gen,100)
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