R help - Jun 2013 - how to extract coefficient from a gamma distribution?

Hello everyone,



I'm trying to fit the gamma probability distribution to time series datasets
suing the following command gam<-fitdistr(x=hist2fit,"gamma") where
hist2fit is the bar histogram of a sample distribution.

The problem is that for some points, it is not possible to fit the gamma
distribution for instance with an histogram having identical value.

I would like to know how to test whether the command
gam<-fitdistr(x=hist2fit,"gamma") properly ended such that I can
decide to save the gamma-parameters (for instance as NaN  in this case).

Without this test, the program stops when I try to store the scale and the shape
parameters.

Any thoughts for a code will be very much appreciated.



Thanks



Armel

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On Jun 11, 2013, at 5:25 PM, Kaptue Tchuente, Armel wrote:
> I'm trying to fit the gamma probability distribution to time series
datasets suing the following command
gam<-fitdistr(x=hist2fit,"gamma") where hist2fit is the bar
histogram of a sample distribution.
> 
> The problem is that for some points, it is not possible to fit the gamma
distribution for instance with an histogram having identical value.
> 
> I would like to know how to test whether the command
gam<-fitdistr(x=hist2fit,"gamma") properly ended such that I can
decide to save the gamma-parameters (for instance as NaN  in this case).
> 
?try
?tryCatch
> Without this test, the program stops when I try to store the scale and the
shape parameters.
> 
> Any thoughts for a code will be very much appreciated.
> 
> 
> 
-- 

David Winsemius
Alameda, CA, USA