Dear Swanton0822, You could refit the model with the statistically significant high-order terms and try plot(allEffects(mod)) from the effects package, where mod is the model object. A caution, however: If you used the default "treatment" contrasts for the factors, then a lower-order term such as dts, which is marginal to the pdts interaction, isn't reasonably interpretable as a test of the lower-order term, here the dts interaction.
I hope this helps, John ------------------------------ John Fox, Professor Department of Sociology McMaster University Hamilton, Ontario, Canada web: socserv.mcmaster.ca/jfox > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Swanton0822 > Sent: January-31-09 11:46 AM > To: r-help@r-project.org > Subject: [R] interaction plot in R for factorial experiment > > > hi, > i did a 2^4 factorial experiment, and i got the following result: > > Effect t p (computer) > > p -484.52494328125 -5.64590926071629 <0.0001 > d -450.67095078125 -5.25142684568607 <0.0001 > pd 438.80508046875 5.11316022388923 0.0001 > t 351.87216640625 4.1001776078805 0.0008 > pt -341.05023984375 -3.97407550262202 0.0011 > dt -311.27784109375 -3.62715371015861 0.0023 > pdt 301.91850265625 3 .51809435977593 0.0029 > s -63.38395046875 -0.73857917511704 0.4709 > ps 51.95851828125 0.60544474253604 0.5534 > ds 59.97782328125 0.69888940207698 0.4947 > pds -50.13595796875 -0.58420742485148 0.5672 > ts -62.18328890625 -0.7245885099744 0.4792 > pts 52.58411734375 0.61273451283464 0.5487 > dts 58.99120359375 0.68739285208981 0.5017 > pdts -50.64764015625 -0.5901697829117 0.5633 > > > and i want to plot those whose are significant in R for an interaction plot > to see their effect? > but i don't know how to do it in R, all i know is using 'interaction.plot()' > can anyone help me out what i need to put in for the plot? > many thanks. > > -- > View this message in context: http://www.nabble.com/interaction-plot-in-R- > for-factorial-experiment-tp21765674p21765674.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.
