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...ot;. So that means "BFGS" method can handle even if fn function is infinite value? What I really want to know is that can I get the same result by using L-BFGS-B method? +++++++++++++++++++++++++++++++++++++++++++++++++++++ Changku Kang National Center for Environmental Assessment EPA (B211F) 919-541-1396 919-541-0245 (fax) Kang.Changku at epa.gov Graduate Student Department of Statistics, NCSU ckang2 at stat.ncsu.edu 919-513-2956 +++++++++++++++++++++++++++++++++++++++++++++++++++++

...;BFGS" method in R, we are using same method to Splus. Is there another consideration when we transferring from Splus to R? Or any suggestions or comments? Thanks in advance. +++++++++++++++++++++++++++++++++++++++++++++++++++++ Changku Kang National Center for Environmental Assessment EPA (B211F) 919-541-1396 919-541-0245 (fax) Kang.Changku at epa.gov Graduate Student Department of Statistics, NCSU ckang2 at stat.ncsu.edu 919-513-2956 +++++++++++++++++++++++++++++++++++++++++++++++++++++

..."BFGS", : initial value in vmmin is not finite I want to make a comment when this happen. Is there way I can put *my* message after this error occur? Thanks in advance +++++++++++++++++++++++++++++++++++++++++++++++++++++ Changku Kang National Center for Environmental Assessment EPA (B211F) 919-541-1396 919-541-0245 (fax) Kang.Changku at epa.gov Graduate Student Department of Statistics, NCSU ckang2 at stat.ncsu.edu 919-513-2956 +++++++++++++++++++++++++++++++++++++++++++++++++++++