[R] a nlm question

Jiang Peng jp021 at sjtu.edu.cn
Mon Nov 3 14:10:34 CET 2008

  Dear R listers,

     I posted this problem several days ago but it seems nobody  

     I use nlm to optimize a given function ,but it always generates  
the following warnings
   Error in nlm(foo, theta.start) : non-finite value supplied by 'nlm'
   I don't know why  ,can anybody give me some hints ?? thanks  in  

   regards .


Jiang Peng, Ph.D. Candidate
Department of mathematics &
Antai college of Economics and management
Shanghai Jiao Tong University
Address: Room 127, #3 Building, Xuhui Campus
E-mail: jp021 at sjtu.edu.cn
              jp021 at 126.com
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