R help- fit distribution "fitdistr"
Inline.
On Thursday, May 26, 2016, Jessica Wang <25695076 at qq.com> wrote:
Hello, I just start using R. I want to use ?fitdistr? to fit distribution of the data. Then how can I verify if the data really fit the distribution? Thanks [data is attached] You can't. There are many ways to judge/quantify the **quality** of the
fit, but your question indicates a complete misunderstanding of basic statistical concepts (imo of course) . I suggest you spend time with a local statistical resource, take some courses, do some reading, etc. Cheers, Bert
res<-fitdistr(data$Report.delay, "Poisson") h<-hist(data$Report.delay) xfit<-floor(seq(0, 250, 50)) yfit<-dpois(xfit,res[[1]][1]) yfit<-yfit*diff(h$mids[1:2])*length(xfit) lines(xfit, yfit, col="blue", lwd=2)
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Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) [[alternative HTML version deleted]]