[R] select a subset

[Stefan Grosse]

gallon li schrieb:
> for id 1, i want to select the last row since all censor indicator is 0; for
> id 2, i want to select the row where censor ==1; for id 3, i also want to
> select the row where censor==1. So if there is a 1 for censor, then I want
> to select such a row, otherwise I want to select the last obs. for this id.
> I am wondering if there is a quick way to solve this?
>   
?subset

and please do read an introductionary text....