Hello. I need to plot a two-way interaction (5 levels X 3) with error bars. The x.factor will be the five-levels var and the trace.factor will be the three level var.
I was able to find functions that draw error bars, but still couldn't find a way to draw an interaction plot that looks like what is common in psychological (and related) journals: the lines (three in my need) are plotted in parallel and to avoid overlapping of the error bars a small jitter is added. I was able to make plotmeans() {from gplots} draw the interaction but with the lines plotted side by side (not parallel), resulting in three panes of one line each. When I tried manually super-imposing (looping a draw of one line for each level in the trace.factor) I got the overall look, but the error bars overlap and are hard to distinguish. Another attempt I made was with ci.plot() {from pda}. Inputting an aov() model resulted in a perfect plot of interaction but which is very limited to handle - I was unable to add a legend, change symbols etc. Does anybody knows if there is a way to manipulate either of the above functions more then what I was able to? Is there another function to draw interaction plots with error bars? Thanks for any help or comment. dror ______________________________________________ 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.