Try this,

library(lattice)
data(barley)
names(barley)

# Removing first column
barley <- barley[,c(-1)]
names(barley)

# Keeping 1st and 3rd column
 barley <- barley[,c(1,3)]
names(barley)
HTH,
Gary


On Sat, Dec 19, 2009 at 3:21 PM, <sarjinder@yahoo.com> wrote:

> What is equivalent to DROP or KEEP statements of SAS in R?
>
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