genvar (version 0.0.2.0)

preserve: preserve a data set before modification

Description

preserve a data set before modification

Usage

preserve(data = NULL)

Arguments

data

a data set to preserve

Value

a value that can be passed to restore to restore the data set later

Examples

# NOT RUN {
require(stats)
use(cars, clear=TRUE)
p <- preserve()
collapse("mean(dist)", "speed")
list()
restore(p, replace=TRUE)
list()
# }