I am having trouble manipulating the simulated effects of a circle graph. I've created a pseudo 3D plot using circle size as 3rd variable. The code I attached has simulated data values for all 3 variable, and is plotting a graph showing an interaction with all 3variables. I am trying to create extreme effects by having the circlesize increase, with increased X value, while holding the other variablesomewhat constant (and then do the other). Any suggestions? _________________________________________________________________ Live. -------------- next part -------------- An embedded and charset-unspecified text was scrubbed... Name: CirclePlot v2.R URL: <https://stat.ethz.ch/pipermail/r-help/attachments/20080918/01ba45be/attachment.pl>