Re: [Rd] Best practices for writing R functions

From: Hadley Wickham <>
Date: Fri, 22 Jul 2011 14:45:32 -0500

> But beware that a function makes a copy of the argument as soon as you try to modify something in that argument. So, for example, if you have a big list object as an argument and are going to modify one element in the list, you will save memory by making a local copy of the single element and modifying that. However, as others have said, I would not worry until you find there is a problem.

That's generally good practice in R - always modify the simplest object possible.


Assistant Professor / Dobelman Family Junior Chair
Department of Statistics / Rice University

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