Hi Steven, Thanks for the quick reply. i have tried but its giving me error--->Error in optim(x = c(38.1815173696765, -12.7988197976440, -3.88212459045077, : initial value in 'vmmin' is not finite
i have tried something like this: library(MASS) x<-rnorm(n=100,mean=10,sd=20); fitdistr(x,dbeta,start=list(shape1=1,shape2=1) Please correct me if my understanding is wrong: In the fitdistr fucntion we are providing the initial values of the Beta distribution parameters as shape1=1 and shape2=1. This function will try to fit the data and give us the new parameters of Beta distribution that approximately fits this data. I have tried the function with other distribution like Normal, Gamma, Weibull...its working fine.. Regards, Som Shekhar On May 4, 1:25 am, Steven Kennedy <stevenkennedy2...@gmail.com> wrote: > library(MASS) > fitdistr(x,"beta",list(shape1=1,shape2=1)) > > > > On Tue, May 3, 2011 at 9:44 PM, Shekhar <shekhar2...@gmail.com> wrote: > > > Hi, > > I have some random data and i want to find out the parameters of Beta > > distribution ( a and b) such that this data approximately fits into > > this distribution. I have tried by plot the histograms and graph, but > > it requires lot of tuning and i am unable to do that. can anyone tell > > me how to do it programmitically in R? > > > Regards, > > Som Shekhar > > > ______________________________________________ > > r-h...@r-project.org mailing list > >https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > ______________________________________________ > r-h...@r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://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.