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beta_pdf

beta probability distribution

CALLING SEQUENCE

[pdf]=beta_pdf(x,a,b)

PARAMETERS

Input

* x = vector of components

* a = beta distribution parameter, a = scalar or vector of the same size than x

* b = beta distribution parameter b = scalar or vector of the same size than x

 

Output

* pdf = probability distribution function at each element of x of the beta(a,b) distribution

DESCRIPTION

Probability distribution function of the beta(a,b) distribution NOTES: mean[(beta(a,b)] = a/(a+b), variance = ab/((a+b)*(a+b)*(a+b+1)).

EXAMPLE

y=beta_pdf(x,10,5)

AUTHOR

Eric Dubois 2002

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