Thanks for everybody, I feel shame after I posting the above message because I found there is a tutorial "Fitting Distributions with R" on http://cran.ii.uib.no/ It's seems not everybody check the dataset's distribution.
Bert Gunter wrote: > > Below. Brief summary is: You **need** to consult a statistician. You know > far too little statistics to do statistical analysis on your own. > > -- Bert > > > Bert Gunter > Genentech Nonclinical Biostatistics > 650-467-7374 > > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] > On > Behalf Of GreenBrower > Sent: Monday, March 09, 2009 9:12 AM > To: r-help@r-project.org > Subject: [R] Is there any method to identify the distribution of a given > dataset? > > > It's important to identify the distribution of a dataset before do > analysis > and inference. > > -- Not necessarily. Indeed, often not. > > Is there any method to identify the distribution of a given > dataset? > -- Yes. It's discrete. The question you mean to ask is : How do I choose > a > suitable model for my data? > > For example, I want to identify a dataset belong to normal of > poisson distribution, how can I do that? > > -- Whew! That you even ask this question is why you need to work with > someone who knows more about statistics. No insult intended. It's kind of > like me asking a biologist what's the difference between a mitochondrion > and > a nucleus. If I know so little about cell biology that I must ask, I > probably need to work with someone more knowledgeable. > > > > -- > View this message in context: > http://www.nabble.com/Is-there-any-method-to-identify-the-distribution-of-a- > given-dataset--tp22413674p22413674.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide > http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > > -- View this message in context: http://www.nabble.com/Is-there-any-method-to-identify-the-distribution-of-a-given-dataset--tp22413674p22430437.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.