From: Alex Gutteridge <alexg@...>
Date: 2007-04-13T09:50:05+09:00
Subject: Re: Probability distributions library in Ruby

On 13 Apr 2007, at 09:35, Alex Gutteridge wrote:

> On 13 Apr 2007, at 06:55, Libra wrote:
>
>> Hello,
>>
>> I would extract some numbers according to a given probability  
>> distribution (at least, Normal, Exponential, Poisson and Bernoulli).
>>
>> Do you know if a similar library already exists in Ruby? I only  
>> found pseudo-random number generator.
>>
>> TIA
>>
>> Libra
>
> If you are comfortable with R, you can use RSRuby (http:// 
> web.kuicr.kyoto-u.ac.jp/~alexg/rsruby/) to generate numbers from  
> any its distribution functions.

A quick bit of googling found the missing Bernoulli distribution  
function:

http://rss.acs.unt.edu/Rdoc/library/Rlab/html/Bernoulli.html

It seems to be part of a CRAN package called Rlab:

http://cran.r-project.org/src/contrib/Descriptions/Rlab.html

You should be able to install and then access this library through  
RSRuby to get your complete set of functions.

Alex Gutteridge

Bioinformatics Center
Kyoto University