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Alex Rivera
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I often write functions that need to see other objects in my environment. For example: > a <- 3 > b <- 3 > x <- 1:5 > fn1 <- function(x,a,b) a+b+x > fn2 <- function(x) a+b+x > fn1(x,a,b) [1] 7 8 9 10 11 > fn2(x) [1] 7 8 9 10 11 As expected, both these functions are identical because fn2 can "see" a and b when it executes. But whenever I start to take advantage of this, within about 30 minutes I end up calling the function without one of the necessary variables (e.g. a or b). If I don't take advantage of this, then I feel like I am passing around objects unnecessarily. Is it better to be explicit about what a function requires? Or should this be taken care of via inline comments or other documentation of the function? Is there a better way?
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