Random

The following functions are used to generate random values with corresponding probability distribution. These functions can be found in the 'Functions and Variables' area of the Property Calculator (for the different areas on the Property Calculator form, see The Property Calculator).

Parameters of these functions can be any calculator expression (not only numeric constants).

Name	Generated expression	Description	Expression example	Ex
normal	normal(mean, standard deviation)	Random value with normal distribution.	normal(0.1, 1.0)	45
lognormal	lognormal(mean, standard deviation)	Random value with lognormal distribution.	lognormal(1.0, 1.0)
random	random(minimum, maximum)	Random value with uniform distribution.	random(0.0, 5.0)
triangular	triangular(minimum, maximum, peak value)	Random value with triangular distribution.	triangular(0, 10, 5)
histogram	histogram(minimum, maximum, number1, number2, ...)	Random value with distribution specified by histogram.	Histogram( 0.0, 10.0, 4,3,2,1)
randomD	randomD(minimum, maximum)	Discrete random value (max, min inclusive).	randomD(1,4)
histogramD	histogramD(value1, rate1, value2, rate2, ...)	Discrete random value according to specified histogram.	histogramD( 1, 0.3, 2, 0.7)	46

Example 45 Random property with normal distribution

normal(2,1)

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Example 46 Discrete random property with specified histogram distribution

histogramD(1, 4, 2, 3, 3, 2, 4, 1, 5, 4)

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