[R] Lazy evaluation in function call

Thorn thorn.thaler at rdls.nestle.com
Tue May 4 16:26:43 CEST 2010

Hi everybody,

how is it possible to refer to an argument passed to a function in the 
function call? What I like to do, is something like

f <- function(x,y) x+y
f(2, x) # should give 4

The problem is of course that x is only known inside the function. Of course I 
could specify something like


but I'm just curious whether it is possible to use a fancy combination of 
eval, substitute or quote ;)

BR, thorn

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