Hi, I'm relatively new to R and need to do a quantile regression. Linear quantile regression works, but for my data I need some quadratic function. So I guess, I have to use a nonlinear quantile regression. I tried the example on the help page for nlrq with my data and it worked. But the example there was with a SSlogis model. Trying to write
dat.nlrq <- nlrq(BM ~ I(Regen100^2), data=dat, tau=0.25, trace=TRUE) or dat.nlrq <- nlrq(BM ~ poly(Regen100^2), data=dat, tau=0.25, trace=TRUE) (I don't know the difference) both gave me the following error message: error in getInitial.default(func, data, mCall = as.list(match.call(func, : no 'getInitial' method found for "function" objects Looking in getInitial, it must have to do something with the starting parameters or selfStart model. But I have no idea, what this is and how I handle this problem. Can anyone please help? Thanks a lot in advance! -- View this message in context: http://www.nabble.com/Non-linear-regression-Quantile-regression-tp23944530p23944530.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.
