[R] Distribution fitting problem

[Adelchi Azzalini]

On Wed, 2 Nov 2005 14:32:52 +0200, Mark Miller wrote:

MM> I am using the MASS library function 
MM> 
MM> fitdistr(x, dpois, list(lambda=2))
MM> 
MM> but I get 
MM> 
MM> Error in optim(start, mylogfn, x = x, hessian = TRUE, ...) :
MM>         Function cannot be evaluated at initial parameters
MM> In addition: There were 50 or more warnings (use warnings() to see
MM> the first  50)
MM> 
MM> and all the first 50 warnings say 
MM> 
MM> 1:  non-integer x = 1.452222
MM> etc
MM> 

are the data integers (as implicit in the assumption of Poisson dist'n)?
the above message seems to say that they are not 

Adelchi Azzalini

-- 
Adelchi Azzalini  <azzalini at stat.unipd.it>
Dipart.Scienze Statistiche, Università di Padova, Italia
tel. +39 049 8274147,  http://azzalini.stat.unipd.it/