[R] selecting by variable

[Eugene Salinas]

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))

(The data is for individuals and each individual has a
number of characteristics including X and Y).

thanks, eugene.