[R] Parameters of Beta distribution

[Albyn Jones]

Are A and B known?  That is, are there known upper and lower bounds
for this credit loss data?  If not, you need to think about how to
estimate those bounds.  Why do you believe the data have a beta distribution?

albyn


On Wed, Oct 07, 2009 at 09:03:31AM -0400, JLucke at ria.buffalo.edu wrote:
> Rescale your data x to  (x-A)/(B-A).
> 
> 
> 
> 
> Maithili Shiva <maithili_shiva at yahoo.com> 
> Sent by: r-help-bounces at r-project.org
> 10/07/2009 08:39 AM
> 
> To
> r-help at r-project.org
> cc
> 
> Subject
> [R] Parameters of Beta distribution
> 
> 
> 
> 
> 
> 
>  
> Supose I have a data pertaining to credit loss as
>  
> amounts <- 
> c(46839.50,31177.12,35696.69,21192.57,29200.91,42049.64,42422.19, 
> 44976.18, 32135.36,47936.57,27322.91,37359.09,43179.60, 48381.02, 
> 45872.38, 28057.30,44643.83,36156.33,16037.62, 45432.28)
>  
> I am trying to fit Beta distribution (two parameters distribution but 
> where lower bound and upper bounds are NOT  0 and 1 respectively). For 
> this I need to estimate the two parameters of Beta distribution. I found 
> some code in VGAM pacakge but it deals with standard Beta distribution 
> i.e. lower bound (say A) = 0 and upper bound (say B) = 1.
>  
> How do I estimate the parameters of the Beta distribution for above data 
> where A and B are not 0's?
>  
> Please guide.
>  
> Thanking you in advance
>  
> Maithili 
> 
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