Distributional characteristics
I haven't seen a reply to your post, and I would like to help you. Unfortunately, I don't see a question in your email. Please tell us why "changing the variable (x-1,ln(x)) didn't get satisfying results", preferably using a toy example that someone else can copy from your email in to R and test a couple if ideas in a matter of seconds. I believe doing that will increase the chances that you will receive a quick and useful reply. (And PLEASE do read the posting guide! "http://www.R-project.org/posting-guide.html". Many people have found it quite helpful.) spencer graves
Naji wrote:
Hi all I've a continuous variable and I want to test (graphically, plotting observed and theoretical distr, qqplot) whether it follows some formal distribution. (some thing close to Ricci document : Fitting distributions with R, Feb05). The distribution I want to fit is a truncated Gamma at 1 (the minimal value is 1), P(x)=Pgamma(rate,x)/(1-Pgamma(rate,x<1)) NB : changing the variable (x-1,ln(x)) didn't get satisfying results Best Naji
______________________________________________ R-help at 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
Spencer Graves, PhD Senior Development Engineer PDF Solutions, Inc. 333 West San Carlos Street Suite 700 San Jose, CA 95110, USA spencer.graves at pdf.com www.pdf.com <http://www.pdf.com> Tel: 408-938-4420 Fax: 408-280-7915