[R] A Question about MLE in R

Andrew Robinson @pro @end|ng |rom un|me|b@edu@@u
Fri Jul 24 21:13:53 CEST 2020

Hi Ravi,

that's an interesting claim and N-M.  Can you provide any reading matter to support it?



Andrew Robinson
Director, CEBRA and Professor of Biosecurity,
School/s of BioSciences and Mathematics & Statistics
University of Melbourne, VIC 3010 Australia
Tel: (+61) 0403 138 955
Email: apro using unimelb.edu.au
Website: https://researchers.ms.unimelb.edu.au/~apro@unimelb/

I acknowledge the Traditional Owners of the land I inhabit, and pay my respects to their Elders.
On Jul 24, 2020, 10:54 PM +1000, Ravi Varadhan <ravi.varadhan using jhu.edu>, wrote:
I agree with John that SANN should be removed from optim.

More importantly, the default choice of optimizer in optim should be changed from "Nelder-Mead" to "BFGS." Nelder-Mead is a bad choice for the most commonly encountered optimization problems in statistics. I really do not see a good reason for not changing the default in optim.

Best regards,


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