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Re: Fwd: log probability density functions (PDFs)


The best option would be to make a standalone extension (see the main gsl page for examples), so people can look at it and try it out. We can add the extension to the main web page and possibly add it to the main source code later if it looks useful.

On 07/09/2012 11:29 AM, Sam Mason wrote:
Hi,

I sent the following message to the help-gsl list a while ago, but
haven't received a reply...

Is this sort of contribution useful to the project?

Thanks,

Sam


---------- Forwarded message ---------- From: Sam Mason <s.a.mason@warwick.ac.uk> Date: 15 June 2012 17:59 To: help-gsl@gnu.org


Hi,


I sent a message to this a couple of months ago enquiring about the
availability of log-density functions.  I've been using my own
versions of these since then, and thought it would be good to send
them back to the community.

I've gone through most of the distributions and added in code
calculating their log-densities.  I've copied the naming and layout
convention of the dirichlet distribution; which already had the
gsl_ran_dirichlet_pdf() and gsl_ran_dirichlet_lnpdf() functions.  I've
not updated the docs yet, as I wanted to gage interest first.

The code compiles and the tests run successfully on my computer.  I've
also used the test code as a mini-benchmark, and the changed code
takes basically the same amount of time to execute (median = 1.0038
times GSL 1.15, 95%CI=1.0009-1.0064).

Let me know what would make this more useful.

Sam



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