- Function LogNormal(Shape, Lowerbound, Scale)¶
LogNormal¶
The function LogNormal
draws a random value from a lognormal
distribution.
LogNormal(
Shape, ! (input) numerical expression
Lowerbound, ! (optional) numerical expression
Scale ! (optional) numerical expression
)
Arguments¶
- Shape
A scalar numerical expression \(> 0\).
- Lowerbound
A scalar numerical expression.
- Scale
A scalar numerical expression \(> 0\).
Return Value¶
The function
LogNormal
returns a random value drawn from a lognormal distribution with shape Shape, lower bound Lowerbound and scale Scale.
Note
The prototype of this function has changed with the introduction of
AIMMS 3.4. In order to run models that still use the original prototype,
the option Distribution_compatibility
should be set to
Aimms_3_0
. The original function LogNormal
(m, sd) returns
a random value drawn from a lognormal distribution with mean \(m>0\)
and standard deviation \(sd>0\). The same result should now be
obtained by setting \(Shape = sd/m\), \(Lowerbound=0\) and
\(Scale = m\).
See also
The LogNormal
distribution is discussed in full detail in Discrete Distributions
of the Language Reference.