DistBeta

class pydsol.core.distributions.DistBeta(stream: StreamInterface, alpha1: float, alpha2: float)

Bases: DistContinuous

The Beta distribution is a continuous distribution that is bound between 0 and 1 for the outcome, and has two shape parameters alpha 1 and alpha2. For informattion see https://mathworld.wolfram.com/BetaDistribution.html

__init__(stream: StreamInterface, alpha1: float, alpha2: float)

Constructs a new Beta distribution, with two shape parameters alpha1 and alpha2. The Beta distribution is a continuous distribution and will return a number between 0 and 1 as the result.

Parameters:

• stream (StreamInterface) – the random stream to use for this distribution

• alpha1 (float or int) – the first shape parameter

• alpha2 (float or int) – the second shape parameter

Raises:

• TypeError – when stream is not implementing StreamInterface:

• TypeError – when alpha1 or alpha2 is not a float or int:

• ValueError – when alpha1 <= 0 or alpha2 <= 0:

draw() → float

Draw a value from the Beta distribution. Based on the algorithm in Law & Kelton, Simulation Modeling and Analysis, 1991, pages 492-493.

probability_density(x: float) → float

Returns the probability density value for value x.

property alpha1: float

Return the parameter value alpha1

property alpha2: float

Return the parameter value alpha2

property stream: StreamInterface

Return the current random stream for this distribution.