How can I add a new method to the generic function "[" or "+"
I want to create a S3 and S4 class that will use the "[" and "+" method in a different way. How can I overload the generic primitive "[" or "+" so the method dispatch will work correctly for my class? I saw an example of this in the ggplot2 package where different objects are joined using the "+" primitive. Still, I could not figure out how to do that. Can someone give a small code example to show how that works? TIA Mark Mark Heckmann Dipl. Wirt.-Ing. cand. Psych. Vorstraße 93 B01 28359 Bremen Blog: www.markheckmann.de R-Blog: http://ryouready.wordpress.com [[alternative HTML version deleted]]
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