Re: [R] non linear quantile regression - Median not plotting where it should

2012-02-13 Thread Roger Koenker
Dan, It is hard to say without being able to reproduce your example. If you send me the data I could try to advise something. Roger url:www.econ.uiuc.edu/~rogerRoger Koenker emailrkoen...@uiuc.eduDepartment of Economics vox: 217-333-4558Unive

Re: [R] Non-Linear Quantile Regression

2008-01-02 Thread Bernardo Rangel Tura
On Tue, 2008-01-01 at 15:16 +0100, Humberto Marotta wrote: > Please, > > I have a problem with nonlinear quantile regression. > > My data shows a large variability and the quantile regression seemed perfect > to relate two given variables. I got to run the linear quantile regression > analysis a

Re: [R] Non-Linear Quantile Regression

2008-01-01 Thread Philippe Grosjean
Hello, You use nlrq() pretty much the same as nls(). Look at ?nls and you will find there many examples on how to use it. The easiest way is to use with a "self-start model". Do apropos("^ss") to get the list of self-starting models defined, and look at their respective help pages to see if on