[R] nonlinear quantile regression
Philippe Grosjean
phgrosjean at sciviews.org
Sun Dec 3 12:25:36 CET 2006
You must specify starting conditions.
PhG
Ricardo Bessa wrote:
> Hello, I’m with a problem in using nonlinear quantile regression, the
> function nlrq.
> I want to do a quantile regression o nonlinear function in the form
> a*log(x)-b, the coefficients “a” and “b” is my objective. I try to use the
> command:
>
> funx <- function(x,a,b){
> res <- a*log(x)-b
> res
> }
>
> Dat.nlrq <- nlrq(y ~ funx(x, a, b), data=Dat, tau=0.25, trace=TRUE)
>
> But a can’t solve de problem, How I put the formula “y ~ funx(x,a,b)”?
>
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