udlogis | R Documentation |
Create UNU.RAN object for a Logistic distribution with
parameters location
and scale
.
[Distribution] – Logistic.
udlogis(location=0, scale=1, lb=-Inf, ub=Inf)
location |
location parameter. |
scale |
(strictly positive) scale parameter. |
lb |
lower bound of (truncated) distribution. |
ub |
upper bound of (truncated) distribution. |
The Logistic distribution with location
= m and
scale
= s has distribution function
F(x) = 1 / (1 + exp(-(x-m)/s))
and density
f(x) = 1/s exp((x-m)/s) (1 + exp((x-m)/s))^-2.
The domain of the distribution can be truncated to the
interval (lb
,ub
).
An object of class "unuran.cont"
.
Josef Leydold and Wolfgang H\"ormann unuran@statmath.wu.ac.at.
N.L. Johnson, S. Kotz, and N. Balakrishnan (1995): Continuous Univariate Distributions, Volume 2. 2nd edition, John Wiley & Sons, Inc., New York. Chap. 23, p. 115.
unuran.cont
.
## Create distribution object for standard logistic distribution distr <- udlogis() ## Generate generator object; use method PINV (inversion) gen <- pinvd.new(distr) ## Draw a sample of size 100 x <- ur(gen,100)
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