Christof Kluß <ckluss <at> email.uni-kiel.de> writes: > But now I search a self-starter for y = a + b * c^x > > Do you know a package that implement such self-starter or is there a > easy way to do it myself?
You might be able to adapt the SS.calib function from the psyphy package for this. It was designed to fit gamma functions to the luminance vs frame buffer values measured on CRT screens. But the functional form is similar. > thx > Christof > > best, Ken -- Kenneth Knoblauch Inserm U846 Stem-cell and Brain Research Institute Department of Integrative Neurosciences 18 avenue du Doyen Lépine 69500 Bron France tel: +33 (0)4 72 91 34 77 fax: +33 (0)4 72 91 34 61 portable: +33 (0)6 84 10 64 10 http://www.sbri.fr/members/kenneth-knoblauch.html ______________________________________________ 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.
