Re: [R] power law distribution; making new distributions

Wed, 02 Mar 2005 16:59:55 -0800

You've cited one form of the Pareto distribution (http://mathworld.wolfram.com/ParetoDistribution.html). A slightly different form is available in Jim Lindsey's package "rmutil". This is not available CRAN, but can be assessed by "www.r-project.org" -> search -> "R site search" -> "Jim Lindsey's packages".

Regarding adding a new distribution to R, you can follow this example from Lindsey or the skewed t distribution in package "skewt". See the documentation on "Writing R Extensions". I don't know the protocol for contributing something to CRAN.

hope this helps. spencer graves

[EMAIL PROTECTED] wrote:

hi

i have data which i think is coming from a power law
distribution P(X > a) = c/a^k and i would like to find
the exponent and constant. i would like it to use my
experimental data to find c and k. 

also, if i would like to create a new distribution, is
it easy to add to R, if so, how is that done?

thanks
-gong




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