[R] How to use "identify"

[David Parkhurst]

I can't get identify to work, using R 2.0.1 under windows xp pro, 
service pack 2.  Here's what I enter, and the result:

 > plot((our.frame2$c1),(our.frame2$c9))  # Produces desired plot
 > identify(our.frame2$c1) # Plot comes to forefront, so I select a point
warning: no point with 0.25 inches
numeric(0)

Is my call to identify correct?  The help page for indentify (from 
?identify) doesn't give any examples, so I don't know what the "x" 
should be.  I right click right on top of one of the points, then left 
click and select stop.

Thanks for any help.

Dave Parkhurst