[R] nonlinear quantile regression

[Philippe Grosjean]

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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