R help - Aug 2004 - Question about mle function

Dear all, 
I'd like to find the mle esttimates using the mle function  
mle(negloglik, start = list(), fixed=list(), method="..."). 
I am using the L-BGFS-B method and I don't supply the gradient function. Is
there a way to print the gradients found at the solution value?

I am using R-1.9.1 on Windows and on Unix. 
Thank you in advance, 
Victoria Landsman. 

 



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"Victoria Landsman" <msvika at mscc.huji.ac.il> writes:
> Dear all, 
> I'd like to find the mle esttimates using the mle function  
> mle(negloglik, start = list(), fixed=list(), method="..."). 
> I am using the L-BGFS-B method and I don't supply the gradient
function. Is there a way to print the gradients found at the solution value?
No. The "details" slot in an mle object is simply the return value
from optim(), and that doesn't provide the gradient. Might be an idea
to change that, though, since the gradient is obviously not zero where
the box constraints are active.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907