This subject is introduced in multivariable calculus, and in more detail in some numerical analysis courses. Graphing is one common technique for identifying promising search ranges if the number of variables can be reduced to one or two. Analytical identification of asymptotes, extrema, and zeros can also be employed to set bounds/starting points for searching, but those topics are in general completely orthogonal to the topic of this mailing list... which is R. --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...1k --------------------------------------------------------------------------- Sent from my phone. Please excuse my brevity.
On August 12, 2015 7:41:13 PM PDT, vidya <desak.ris...@yahoo.co.id> wrote: >How can you find that starting value ? is there a trick for that ?. > >Really appreciate. Thank you very much. > > >King Regards > > > > > > > > >-- >View this message in context: >http://r.789695.n4.nabble.com/nls-in-r-tp4711012p4711043.html >Sent from the R help mailing list archive at Nabble.com. > >______________________________________________ >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >https://stat.ethz.ch/mailman/listinfo/r-help >PLEASE do read the posting guide >http://www.R-project.org/posting-guide.html >and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.