R help - Sep 2010 - assignment by value or reference

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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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
>
>
>
>
> 	[[alternative HTML version deleted]]
>
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