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...r show or for demonstration. Like any well-designed tool, it falls easily to the hand and feels good to use. Instead of providing constraints, checks and rigorous boundaries, it concentrates on providing you with power and on not getting in your way." Preface to "The C Book", M Banahan et al Terry Therneau On 03/21/2013 06:00 AM, r-devel-request@r-project.org wrote: > Allowing partial matching on $-extraction has always been a source of accidents. > Recently, someone who shall remain nameless tried names(mydata) <- "d^2" followed by > mydata$d^2. As va...