[R] Finding Lambda in Poisson distribution
Matthias.Kohl at stamats.de
Mon Mar 2 19:58:14 CET 2009
assuming the assumption of Poisson distribution is true (or at least
approximately true), you can use MLE as mentioned by Roland using
(fitdistr of MASS, mle of stats4, MLEstimator of distrMod, probably more).
Using package distrMod you can compute minimum distance estimators (cf.
Using package ROptEst you can compute (in some sense) optimally robust
estimators (cf. function roptest).
Rau, Roland wrote:
>> -----Original Message-----
>> From: r-help-bounces at r-project.org
>> [mailto:r-help-bounces at r-project.org] On Behalf Of Saeed Ahmadi
>> Sent: Monday, March 02, 2009 3:16 PM
>> To: r-help at r-project.org
>> Subject: [R] Finding Lambda in Poisson distribution
>> I have a dataset. First of all, I know that my dataset shall
>> follow the
>> Poission distribution. Now I have two questions:
>> 1) How can I check that my data follow the Poisson distribution?
>> 2) How can I calculate Lambda of my data?
> is this maybe some homework?
> For 2): I simulated data and did some simple MLE. I don't know if this
> is the recommended way, but it worked fine for me.
> This mail has been sent through the MPI for Demographic Research. Should you receive a mail that is apparently from a MPI user without this text displayed, then the address has most likely been faked. If you are uncertain about the validity of this message, please check the mail header or ask your system administrator for assistance.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Dr. Matthias Kohl
More information about the R-help