R help - Feb 2011 - Fund style categorizing

I've got a fund performance report for the last year,in which one
column states their management style,i.e. long/short,market neutral. I
want to categorize all the fund into subgroups by their management
style.How can I do that?

?aggregate
?tapply
data.table package

example data and output would have been useful

Sent from my iPad

On Feb 6, 2011, at 15:02, Ning Cheng <wakinchauemil at gmail.com> wrote:
> I've got a fund performance report for the last year,in which one
> column states their management style,i.e. long/short,market neutral. I
> want to categorize all the fund into subgroups by their management
> style.How can I do that?
> 
> ______________________________________________
> R-help at 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.