Dear GlenB, The allEffects() function in the effects package can make these plots.
I hope this helps, John > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of GlenB > Sent: January-27-10 9:09 PM > To: r-help@r-project.org > Subject: [R] plotting additive ns components > > > > I have an additive model of the following form : > > zmdlfit <- lm(z~ns(x,df=6)+ns(y,df=6)) > > I can get the fitted values and plot them against z easily enough, but I > also want to both obtain and plot the two additive components (the estimates > of the two additive terms on the RHS) > > I've been looking at manuals and searching on the internet and searching the > archives, but I'm apparently incompetent because I can't locate it - how do > I plot just the x and y splines (against x and y)? > > I've read the help on predict.lm, and on predict.ns (/predict.bs) but it > only shows how to get the new columns for new values of x; I could multiply > those by the coefficients of the spline fit, and I could also do it by > holding each variable fixed while the other varies in predict (which is > right up to an additive constant), but it seems like there would have to be > a more straightforward that way I am missing. It looks like gam and mgcv do > it for you, but can I do it with just lm and ns? > > -- > View this message in context: http://n4.nabble.com/plotting-additive-ns- > components-tp1312375p1312375.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. ______________________________________________ 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.