interactive graphics in R
Just fyi, the identify() function does not seem to work when called from the RExpression actor. (I'm using Windows XP, the 14 Apr nightly build of Kepler, R 2.6.2)
When called from the R command line, this function waits for a pre-specified number of mouse clicks, then inserts labels at those (x,y)-coordinates. It's handy for labeling points, but not essential. I only bring it up because the reason(s) that it doesn't work via the RExpression actor may be related to other issues in past or future, etc.