[R] if statement

[Simon Blomberg]

My solutions are usually too baroque, but does this do what you want?

x <- rnorm(100)
quants <- quantile(x, c(.3, .7))
Case <- rep(2, length(x)) # 2 lies in the middle of the distribution
Case[x <= quants[1]] <- 0
Case[x >= quants[2]] <- 1
Case

Cheers,

Simon.

On Mon, 2007-06-11 at 15:14 -0700, Jiong Zhang, PhD wrote:
> Hi all,
> 
> I have a rather naive question. I have the height of 100 individuals in
> a table and I want to assign the tallest 30% as Case=1 and the bottom
> 30% as Case=0.  How do I do that?
> 
> thanks.
> 
> jiong
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-- 
Simon Blomberg, BSc (Hons), PhD, MAppStat. 
Lecturer and Consultant Statistician 
Faculty of Biological and Chemical Sciences 
The University of Queensland 
St. Lucia Queensland 4072 
Australia

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T: +61 7 3365 2506 
email: S.Blomberg1_at_uq.edu.au 

The combination of some data and an aching desire for 
an answer does not ensure that a reasonable answer can 
be extracted from a given body of data. - John Tukey.