See the R Language Definition manual. Since R knows about lazy
evaluation, it is sometimes neither by reference nor by value.
If you want to think binary, then "by value" fits better than "by
reference".
Uwe Ligges
On 05.09.2010 17:19, Xiaobo Gu wrote:
Hi Team,
Can you please tell me the rules of assignment in R, by value or by
reference.
From my about 3 months of experience of part time job of R, it seems most times
it is by value, especially in function parameter and return values assignment;
and it is by reference when referencing container sub-objects of container
objects, such as elements of List objects and row/column objects of DataFrame
objectes; but it is by value when referencing the smallest unit of element of a
container object, such as cell of data frame objects.
Xiaobo.Gu
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