[R] quantiles of the inverse chi-squared

From: Ekkehart Bethge <bethge_at_ifh.uni-karlsruhe.de>
Date: Fri 05 May 2006 - 02:55:11 EST


Hello,
I'm looking for a easy way to calculate the quantiles (e.g. 95% quantile) of the inverse chi-squared distribution. This distribution is used as a prior for some bayesian inference calculation, which I want to achieve analyticaly. Is it possible to calculate it through the inverse cdf option of the chi-squared function (qchisq)? The only other functions which I found for the inverse chi-squared are the density and random number generation function invchisq in the geoR-package. If there is no easy way to calculate it, I would be glad if anybody knows where to find a complete set of the tabulated quantiles. Thank you very much. Yours Ekkehart



Dipl. Geoökol. Ekkehart Bethge

Universität Karlsruhe (TH)
Graduiertenkolleg Naturkatastrophen

Institut für Hydromechanik
Kaiserstraße 12
D - 76128 Karlsruhe

Phone: ++49 721 608 7793
Email: bethge@ifh.uka.de



R-help@stat.math.ethz.ch mailing list
https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Fri May 05 02:59:07 2006

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Fri 05 May 2006 - 04:09:58 EST.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.