[R] Calling on certina columns

[David Winsemius]

On May 23, 2012, at 5:47 PM, Chris Burns wrote:

> I'm trying to run a regression on certain columns.  The columns are  
> named
> "Cat_1", "Cat_2" etc.  Is there a way to call upon all of the  
> columns that
> contain "Cat"?
>

lm( y ~ . , data=dfrm[, c("y", grep("Cat", names(dfrm), value=TRUE) ] )

OR:

lm (y ~ . , data=dfrm[,  grep("Cat|y", names(dfrm) ) ] )
>

-- 

David Winsemius, MD
West Hartford, CT