Re: [R] median of gamma distribution
Hi, to compute the median (or expectation, var, sd, IQR, mad, ...) you can also use package distrEx. library(distrEx) (G - Gammad()) median(G) Matthias - original Nachricht Betreff: Re: [R] median of gamma distribution Gesendet: Fri, 30. Jun 2006 Von: [EMAIL PROTECTED] On 30-Jun-06 Philip He wrote: Doese anyone know a R function to find the median of a gamma distribution? qgamma will do it. Test: -log(0.5) [1] 0.6931472 qgamma(0.5,1) [1] 0.6931472 Ted. E-Mail: (Ted Harding) [EMAIL PROTECTED] Fax-to-email: +44 (0)870 094 0861 Date: 30-Jun-06 Time: 16:53:16 -- XFMail -- __ 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 --- original Nachricht Ende -- Dr. rer. nat. Matthias Kohl [EMAIL PROTECTED] www.stamats.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
[R] median of gamma distribution
Doese anyone know a R function to find the median of a gamma distribution? [[alternative HTML version deleted]] __ 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
Re: [R] median of gamma distribution
Philip He [EMAIL PROTECTED] writes: Doese anyone know a R function to find the median of a gamma distribution? qgamma(0.5, ) -- O__ Peter Dalgaard Øster Farimagsgade 5, Entr.B c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 __ 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
Re: [R] median of gamma distribution
On Fri, 30 Jun 2006, Philip He wrote: Doese anyone know a R function to find the median of a gamma distribution? It's not clear what you mean. If you know the parameters of a gamma distribution then qgamma() will give you any quantile. If you have data and want to estimate the median then it's hard to beat median(), but you could use mle() to estimate the parameters and then qgamma(). -thomas __ 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
Re: [R] median of gamma distribution
From: Philip He [EMAIL PROTECTED] Date: Fri Jun 30 10:30:28 CDT 2006 To: R help list r-help@stat.math.ethz.ch Subject: [R] median of gamma distribution someone might know a more elegant way but one way is to use the distribution ( i think it's dnorm for the normal but i get confused because ther is also pnorm, rnorm and one other but you can look that up to figure out which one is the one you need ) functions in R and just put in .50 as the probabiliy input and itr will kick back the result which is the median. mark Doese anyone know a R function to find the median of a gamma distribution? [[alternative HTML version deleted]] __ 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 __ 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
Re: [R] median of gamma distribution
On 30-Jun-06 Philip He wrote: Doese anyone know a R function to find the median of a gamma distribution? qgamma will do it. Test: -log(0.5) [1] 0.6931472 qgamma(0.5,1) [1] 0.6931472 Ted. E-Mail: (Ted Harding) [EMAIL PROTECTED] Fax-to-email: +44 (0)870 094 0861 Date: 30-Jun-06 Time: 16:53:16 -- XFMail -- __ 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
