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Sampling from a Beta(a,b) distribution (Read 2018 times)

SamW

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Sampling from a Beta(a,b) distribution
Nov 26^th, 2010 at 12:41pm

Can anyone help with how to draw random numbers from a Beta(a,b) distribution?

I'm programming a Dirichlet Process Prior for rate categories but do not know of a built-in HyPhy function that draws from this distribution.

Does one already exist? If so, can someone point me to source code or instructions on how to implement?

Any help will be much appreciated. Thank you!

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Sergei YaBB Administrator Offline Datamonkeys are forever... Posts: 1658 UCSD Gender:	Re: Sampling from a Beta(a,b) distribution Reply #1 - Dec 10^th, 2010 at 3:12pm Hi Sam, Sorry took me a while to answer. Look inside TemplateBatchFiles/Utility/ProbabilityDistributions.bf It has a sampleFromBeta (p,q) function. Use example: Code: LoadFunctionLibrary ("ProbabilityDistributions"); for (k = 0; k < 10; k += 1) { fprintf (stdout, sampleFromBeta (5,5), "\n"); } Sergei
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SamW YaBB Newbies Offline Feed your monkey! Posts: 18	Re: Sampling from a Beta(a,b) distribution Reply #2 - Dec 10^th, 2010 at 4:28pm Thanks a bunch! I was wondering where those distros are at. Sam
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