https://github.com/cran/nls2
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Tip revision: d3b69efc97b8effa07be9ff378d1af6c4e43a85e authored by G. Grothendieck on 21 December 2012, 00:00:00 UTC
version 0.1-4
Tip revision: d3b69ef
TODO

o a maximum rather than a minimum of maxiter starting values are 
  generated - todo

o if start is a data frame with n+1 rows where n is the number of
  parameters to optimize then Nelder Mead is used first - todo

o add minpack.lm interface - todo

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