You have to return the value of 'data' from the function. Functions
do not have "side effects".
> data<-data.frame(col1=c(1,2,3,4,5))
>
> getcol2<-function(data){
+ data$col2[data$col1<=2]="L"
+ data # return value
+ }
>
> getcol2(data)
col1 col2
1 1 L
2 2 L
3 3 <NA>
4 4 <NA>
5 5 <NA>
>
On Mon, Aug 13, 2012 at 9:08 PM, Sachinthaka Abeywardana
<sachin.abeyward...@gmail.com> wrote:
> Hi all,
>
> I want to do the following:
>
> data<-data.frame(col1=c(1,2,3,4,5))
>
> getcol2<-function(data){
> data$col2[data$col1<=2]="L"
> }
>
> getcol2(data)
>
> Unfortunately in the above col2 does not appear in the final data. So how
> would you pass this by reference such that you would get it back?
>
> Thanks,
> Sachin
>
> [[alternative HTML version deleted]]
>
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--
Jim Holtman
Data Munger Guru
What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.
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