[R] Fitting Gamma distribution
jorismeys at gmail.com
Fri Jun 18 16:14:40 CEST 2010
You can use rgamma to get a gamma distribution for use in qqplot, eg :
On Wed, Jun 16, 2010 at 9:40 AM, Marcosco01
<marco.scortichini at bancamarche.it> wrote:
> I'm looking for goodness of fit tests for gamma distributions with large data
> sizes and for different data.
> I have a matrix with around 4.000 data values in it and i have fitted a
> gamma distribution with "fitdistr".
> You can see the example:
> Errore in optim(x = c(5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000,
> 5000, :
> non-finite finite-difference value 
> The problem is the optimization for the test with different data and for the
> size larger than 516 data.
> in summary
> -is there a gamma goodness of fit test that doesnt depend on the sample
> -is there a way of using qqplot for gamma distributions, if so how would you
> calculate it from a matrix of data values?
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