Thanks, David. I did try to use predict() to obtain the graph, but it somehow looks different from the one generated by "plot" command. So, I was wondering if there is any way that I can get the one generated by "plot" so that I can compare. Thank you.
Le On Wed, Aug 25, 2010 at 11:15 PM, David Winsemius <dwinsem...@comcast.net> wrote: > > On Aug 25, 2010, at 10:46 PM, Le Wang wrote: > >> Hi there, >> >> I have a question regarding the "plot" command after estimation. >> >> Specifically, I estimate a model, say regressing y on x and z. And >> after estimation, I would like to plot the fitted values against x, >> but I don't need that for z. The following command always gives two >> graphs, for both variables x and z. >> >> plot.np<-plot(model, plot.errors.method = "asymptotic") >> >> My question is, what option should I specify in order to get the graph >> for x only? > > Pick a constant value for "z" and vary "x" in a dataframe that you offer to > the newdata argument of predict. > > ?predict > > Then plot those values versus x. > >> >> I know this is probably a very simple question, but I searched around >> for a while without any luck. Thank you for your time. > > -- > > David Winsemius, MD > West Hartford, CT > > -- ~~~~~~~~~~~~~~~~~~~~~~ Le Wang, Ph.D Population Center University of Minnesota ______________________________________________ R-help@r-project.org 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.
