Re: [R] interpolation and 3D plots
Dear Jonathan, The all.effects function in the car package will identify the high-order terms in a linear or generalized-linear model and absorb terms marginal to them (e.g., for a two-way interaction, the main effects marginal to the interaction and the constant). The plot method for the object produced uses trellis graphics to plot terms, but for a two-way interaction, the information in the object could easily be plotted as an image (or other 3D) plot. I hope that this helps, John At 10:02 AM 2/3/2003 +, Davies, Jonathan wrote: I've been told that you may be able to help. I have a complex linear model with multiple two-way interaction terms. Is there a way to view the interaction terms in a 3d plot equivalent to the S functions: > plan<-interp(x,y,z) > image(plan) where x and y are my explanatory variables and z my response variable. - John Fox Department of Sociology McMaster University Hamilton, Ontario, Canada L8S 4M4 email: [EMAIL PROTECTED] phone: 905-525-9140x23604 web: www.socsci.mcmaster.ca/jfox - __ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
Re: [R] interpolation and 3D plots
library(akima) plan <- interp.old(x,y.z) image(plan) is very close. This is in MASS (the book) with examples. On Mon, 3 Feb 2003, Davies, Jonathan wrote: > I've been told that you may be able to help. > > I have a complex linear model with multiple two-way interaction terms. Is > there a way to view the interaction terms in a 3d plot equivalent to the S > functions: > > > plan<-interp(x,y,z) > > image(plan) > > where x and y are my explanatory variables and z my response variable. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UKFax: +44 1865 272595 __ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
[R] interpolation and 3D plots
I've been told that you may be able to help. I have a complex linear model with multiple two-way interaction terms. Is there a way to view the interaction terms in a 3d plot equivalent to the S functions: > plan<-interp(x,y,z) > image(plan) where x and y are my explanatory variables and z my response variable. Thanks, Jonatha Davies __ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help
