[R] index question

[Sundar Dorai-Raj]

Jeffrey Stratford wrote:
> Thanks for those on the list that answered my previous question.  I'm
> just about where I need to be (looking at output).  
> 
> In the hier.part documentation there is a line env <- urbanwq[,2:8].  
> 
> This means use rows 2 through 8 in the data frame "urbanwq", right? 
> What does the comma represent?  If one wasn't using column headers would
> this be necessary?
> 
> Thanks,
> 
> Jeff
> 
> 

Hi, Jeff,

Actually it means *columns* 2:8. See the documentation and examples in 
help("[").

--sundar

/war eagle