Thanks, this works for me as well, though the lines extend beyond the Y axes (sometimes). I'm very grateful.
---------- Original Message ---------------------------------- From: "Liaw, Andy" <[EMAIL PROTECTED]> Date: Mon, 19 Jul 2004 10:04:55 -0400 >This works for me: > >data(engel) >plot(engel$x, engel$y, xlab="household income", ylab="food expenditure", > cex=.5) >taus <- c(.05,.1,.25,.75,.9,.95) >lapply(taus, function(tau) abline(coef(rq(y~x, data=engel, tau=tau)))) > >HTH, >Andy > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of >> [EMAIL PROTECTED] >> Sent: Monday, July 19, 2004 9:53 AM >> To: [EMAIL PROTECTED] >> Subject: [R] why won't rq draw lines? >> >> >> I've been trying to draw quantile linear regression lines >> across a scatterplot of my data using >> >> attach(forrq) >> plot(PREGNANT,DAY8,xlab="pregnant EPDS",ylab="postnatal >> EPDS",cex=.5) >> taus <- c(.05,.1,.25,.75,.9,.95) >> xx <- seq(min(PREGNANT),max(PREGNANT),100) >> for(tau in taus){ >> f <- coef(rq(DAY8~PREGNANT,tau=tau)) >> yy <- (f[1]+f[2]*xx) >> lines(xx,yy) >> } >> which is simply the method from the help file with my dataset >> attached, and the variable names substituted where >> appropriate. I get the scatterplot, but no lines. Any ideas >> about what's going on? or wrong? >> >> >> ______________________________________________________________ >> _________ >> Most doctors use http://www.Doctors.net.uk e-mail. >> Move to a free professional address with spam and virus protection. >> >> ______________________________________________ >> [EMAIL PROTECTED] mailing list >> https://www.stat.math.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide! >> http://www.R-project.org/posting-guide.html >> >> > > >------------------------------------------------------------------------------ >Notice: This e-mail message, together with any attachments, contains information of >Merck & Co., Inc. (One Merck Drive, Whitehouse Station, New Jersey, USA 08889), >and/or its affiliates (which may be known outside the United States as Merck Frosst, >Merck Sharp & Dohme or MSD and in Japan, as Banyu) that may be confidential, >proprietary copyrighted and/or legally privileged. It is intended solely for the use >of the individual or entity named on this message. If you are not the intended >recipient, and have received this message in error, please notify us immediately by >reply e-mail and then delete it from your system. >------------------------------------------------------------------------------ > >________________________________________________________________________ >Doctors.net.uk e-mail protects you from viruses and unsolicited messages >________________________________________________________________________ > _______________________________________________________________________ Most doctors use http://www.Doctors.net.uk e-mail. Move to a free professional address with spam and virus protection. ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
