---------- Forwarded message ----------
From: gallon li <[EMAIL PROTECTED]>
Date: Tue, Nov 25, 2008 at 1:58 PM
Subject: Re: [R] select a subset
To: Stefan Grosse <[EMAIL PROTECTED]>
I am sorry but my question is not solvable by using subset alone.
You see, the selection criterion is different for different id. This may not
be easily specified in the subset function.
Yes, I did think about this function before but couldn't find ways to use
it.
On Mon, Nov 24, 2008 at 8:42 PM, Stefan Grosse <[EMAIL PROTECTED]>wrote:
> 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....
>
[[alternative HTML version deleted]]
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
