Are you using mgcv:::gam? To get plot data suitable for making plots of smooth effects, you probably need to use `predict.gam' to evaluate the smooth curves (and standard errors) at a nice regular set of points for plotting. Also don't forget that the residuals shown on plot.gam are the `partial residuals' (i.e. the residuals + the smooth concerned).
best, Simon On Sunday 22 November 2009 01:09, Joe Trubisz wrote: > Hello all... > > I'm attempting to write my own GAM plot function, so I can overlay it > on top of an already existing plot. > > Problem is that after I do the gam, e.g. m<-gam(...), I cannot match > the graph that gam.plot outputs when I attempt to plot the values > from m$residuals, m$linear.predictors or m$fitted.values. Kind of at a > loss what variables to use or if I need to do something else before I > attempt to plot them. > > Can someone explain to me where I'm going wrong and what I need to do > to correct this? > > Thanks, > Joe > > ______________________________________________ > 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. -- > Simon Wood, Mathematical Sciences, University of Bath, Bath, BA2 7AY UK > +44 1225 386603 www.maths.bath.ac.uk/~sw283 ______________________________________________ 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.
