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reg100
2009 Jun 09
1
Non-linear regression/Quantile regression
...uantile 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' m...