[R] Dealing with data

[David Winsemius]

On Aug 13, 2010, at 1:03 PM, TGS wrote:

> # how would I code in R to look at the letter of the alphabet
> # in the second column and create a indicator column for the
> # corresponding letter?
>
> data(InsectSprays)
> InsectSprays$spray

It's already what most people mean when they say "indicator column",  
i.e., a factor variable (and not a character vector) .... so,  what do  
_you_ mean?
>


-- 

David Winsemius, MD
West Hartford, CT