Re: [R] A manipulation problem for a large data set in R

On Wed, 27 Aug 2008, Giuseppe Paleologo wrote: I have two questions for the group. One is very concrete, and is dangerously close to a "please do my homework" posting. The second follows from the first one but is more general. I would welcome the advice of experienced R users. As for the first

[R] A manipulation problem for a large data set in R

I have two questions for the group. One is very concrete, and is dangerously close to a "please do my homework" posting. The second follows from the first one but is more general. I would welcome the advice of experienced R users. As for the first one: I have a data frame with two variables X Y