Re: Pareto distribution--need help
From: Roger Bagula (tftn_at_earthlink.net)
Date: 01/26/05
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Date: Wed, 26 Jan 2005 16:17:46 GMT
npus001@ec.auckland.ac.nz wrote:
> Hi all,
>
> I was doing a simulation based on Pareto distribution. For a set
> empirical values how can set the values for mode and shape parameter so
> that the pareto distribution obtained is similar to those empirical
> values.
>
> Thanks
>
> Nikhi
>
http://mathworld.wolfram.com/ParetoDistribution.html
http://www.ds.unifi.it/VL/VL_EN/special/special12.html
f(x)=1-(b/x)^a
To get the "a" you do a log plot and find the negative slope.
To get "b" you use the intercept: divide by a and take exp() the result...
Log[(b/x)^a]=-a*log[x]+a*log[b]
That's what I get from the formula anyway.
Roger L. Bagula
tftn@earthlink.net, 11759Waterhill Road, Lakeside,Ca 92040-2905,tel:
619-5610814 :
alternative email: rlbtftn@netscape.net
URL : http://home.earthlink.net/~tftn
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