Package questions to package maintainers.... please. The short answer is that your alpha = .4 parameter needs to be passed to summary not to plot. Try this:
> plot(summary(rq(foodexp~income,tau = 1:49/50,data=engel),alpha =. > 4), nrow=1, > ncol=2, ols = TRUE) A longer answer would involve a boring disquisition about various fitting methods and standard error estimation methods and their historical evolution and defaults. (By default rank-based confidence bands are being used for the engel data since the sample size is relatively small.) Regarding your more fundamental question: you can always modify functions such as summary.rq or plot.summary.rqs -- see for example ?fix. url: www.econ.uiuc.edu/~roger Roger Koenker email [EMAIL PROTECTED] Department of Economics vox: 217-333-4558 University of Illinois fax: 217-244-6678 Champaign, IL 61820 On Jul 24, 2007, at 11:07 AM, Jeff G. wrote: > Hello, > > I am having problems adjusting the plot output from the quantreg > package. Anyone know what I'm doing wrong? > > For example (borrowing from the help files): > > plot(summary(rq(foodexp~income,tau = 1:49/50,data=engel)), nrow=1, > ncol=2,alpha = .4, ols = TRUE, xlab="test") > > The "alpha=" parameter seems to have no effect on my output, even > when I > set it to a ridiculous value like 0.4. Also, though in the help > file it > says |"...| = optional arguments to plot", "xlab" (as an example) > seems > to do nothing. If the answer is that I should extract the values I > need > and construct the plot I want independently of the rq.process object, > that it okay I suppose, if inefficient. Maybe a more fundamental > question is how do I get in and see how plot is working in this > case so > that I can modify. > > Thanks much! > > J > > P.S. I've explored using plot.summary.rqs but the problems seem to be > the same. > > ______________________________________________ > [email protected] mailing list > 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. ______________________________________________ [email protected] mailing list 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.
