[R] selecting by variable

[Petr Pikal]

Hallo

On 27 Aug 2003 at 1:49, Eugene Salinas wrote:

> Hi,
> 
> I'm a recent R convert so I haven't quite figured out
> the details yet...
> 
> How do I select one variable by another one? Ie if I
> want to draw the histogram of variable X only for
> those individuals that also have a value Y in a
> certain range?
> 
> In STATA I would give something like:
> 
> histogram X if ((Y>=A & Y<=B))

hist(X[(Y>=A)&(Y<=B)])

if A and B are objects storing your limits

?Logic
?"["

> 
> (The data is for individuals and each individual has a
> number of characteristics including X and Y).
> 
> thanks, eugene.
> 
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Cheers
Petr Pikal
petr.pikal at precheza.cz