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
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