Thank you for your suggestions. We are currently working with an the nls function, but are having trouble getting a curve that fits our data. We have tried using the following formula:
mod1 = nls(time~a*exp(b*(date)), start=list(a=4.178,b=-1.18)) av=mdate bv=predict(mod1,list(mdate=av)) length(av) length(bv) lines(av,bv) We've been trying to work with your suggestions but aren't having any luck thus far. We've also tried to exponentiate the times in hopes they would produce a better fit, but can't seem to produce a formula without getting errors. Any further help/explanations would be appreciated. -- View this message in context: http://r.789695.n4.nabble.com/Negative-exponential-fit-tp4117889p4121694.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
