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Re: Generating gamma distributed random variables

Posted by Grześ Andruszkiewicz on Feb 07, 2013; 8:38pm
URL: http://quantlib.414.s1.nabble.com/Generating-gamma-distributed-random-variables-tp14008p14011.html

Hi Peter,

It is implemented in boost, see e.g.
http://stackoverflow.com/questions/5499967/gamma-distributed-random-variables-in-c.
You would have to look at the boost code to get the actual details
though.

Cheers,
Grzegorz

On 7 February 2013 18:53, Peter Caspers <[hidden email]> wrote:

> Hi,
>
> there is an implementation of the gamma function and the incomplete gamma
> function in ql (be careful, "incomplete gamma function" seems to be defined
> differently at different places confusingly). With these it is easy to
> compute your pdf and cdf. The inverse cdf seems not to be available in ql. I
> implemented it using a numerical zero search. I am not sure if there are
> better ways to do this ?
>
> Peter
>
> Am 07.02.2013 14:52, schrieb Grześ Andruszkiewicz:
>>
>> Hi,
>>
>> Is the generation of gamma distributed random variables implemented in
>> QuantLib (e.g. the inverse cumulative function)? There is a
>> GammaDistribution class, but it might be only density...
>>
>>   I can always use boost if the answer is negative.
>>
>> Cheers,
>> Grzegorz
>>
>>
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