Hi Ahmed, Does 'quadratic plateau' model refer to a chage-point or bent-cable regression with quadratic on one side and an asymptote on the other ? If so, you might like to look at the bentcableAR package. There is a background article here: http://faculty.washington.edu/gchiu/Articles/bentcable-jasa.pdf
Michael On 22 November 2010 06:06, Ahmed Attia <ahmedati...@gmail.com> wrote: > Dear All, > > I'm a beginner user in R and I would like to make a quadratic and > plateau model in R. Can you help please with an example? > > Thanks so much > > > > -- > Ahmed M. Attia > Assistant Lecturer > El-Khattara farm Station > Agronomy Dept., > Zgazig Univ., Egypt > Visiting Scientist > Haskell Agricultural laboratory > Agronomy and Horticultural Dept., > Univ. of Nebraska-Lincoln > ahmeda...@zu.edu.eg > aattiamoham...@unlnotes.unl.edu > Cell phone: 4023604178 > > ______________________________________________ > R-help@r-project.org mailing list > 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 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.