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# Beta

#### PDF

Evaluates the PDF of the Beta distribution.
 double PDF (double x, double a, double b)

#### CDF

Returns the area from zero to x under the beta density.
 double CDF (double x, double a, double b)[inline]

#### CDF Inv

Evaluates the inverse of the Beta CDF.
 double CDF_inv (double y, double alpha, double beta)[inline]

#### Random Sample

Cheng's BB algorithm for generating Beta distribution random values
 double sample (double alpha, double beta, double seed=0)