> On Oct 6, 2015, at 7:58 AM, Lorenz, David <lor...@usgs.gov> wrote: > > Did you verify that the correct percentages were above/below the regression > lines? I did a quick check and for example did not consistently get 50% of > the observed response values greater than the tau=.5 line. I did when I > included the nonzero intercept term.
Your "correct percentages" are only correct when you have an intercept in the model, without an intercept there is no gradient condition to ensure that. > > > >> Date: Mon, 5 Oct 2015 21:14:04 +0530 >> From: Preetam Pal <lordpree...@gmail.com> >> To: stephen sefick <ssef...@gmail.com> >> Cc: "r-help@r-project.org" <r-help@r-project.org> >> Subject: Re: [R] Quantile Regression without intercept >> Message-ID: <56129a41.025f440a.b1cf4.fffff...@mx.google.com> >> Content-Type: text/plain; charset="UTF-8" >> >> Yes..it works. .... Thanks ?? >> >> -----Original Message----- >> From: "stephen sefick" <ssef...@gmail.com> >> Sent: ?05-?10-?2015 09:01 PM >> To: "Preetam Pal" <lordpree...@gmail.com> >> Cc: "r-help@r-project.org" <r-help@r-project.org> >> Subject: Re: [R] Quantile Regression without intercept >> >> I have never used this, but does the formula interface work like lm? Y~X-1? >> >> >> On Mon, Oct 5, 2015 at 10:27 AM, Preetam Pal <lordpree...@gmail.com> >> wrote: >> >> Hi guys, >> >> Can you instruct me please how to run quantile regression without the >> intercept term? I only know about the rq function under quantreg package, >> but it automatically uses an intercept model. Icant change that, it seems. >> >> I have numeric data on Y variable (Gdp) and 2 X variables (Hpa and >> Unemployment). Their sizes are 125 each. >> >> Appreciate your help with this. >> >> Regards, >> Preetam >> [[alternative HTML version deleted]] >> >> ______________________________________________ >> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >> 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. >> >> >> >> >> >> >> -- >> >> Stephen Sefick >> ************************************************** >> Auburn University >> Biological Sciences >> 331 Funchess Hall >> Auburn, Alabama >> 36849 >> ************************************************** >> sas0...@auburn.edu >> http://www.auburn.edu/~sas0025 >> ************************************************** >> >> Let's not spend our time and resources thinking about things that are so >> little or so large that all they really do for us is puff us up and make us >> feel like gods. We are mammals, and have not exhausted the annoying little >> problems of being mammals. >> >> -K. Mullis >> >> "A big computer, a complex algorithm and a long time does not equal >> science." >> >> -Robert Gentleman >> [[alternative HTML version deleted]] >> >> >> >> > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.